Physical Development in Infancy & Toddlerhood

Chapter Objectives

After this chapter, you should be able to:

1. Describe the physical changes that occur during the first two years of life.

2. Identify common infant reflexes.

3. Discuss the sleep needs during the first two years of life.

4. Summarize the sequence of both fine and gross motor skills.

5. Recognize the developing sensory capacities of infants and toddlers.

6. Explain how to meet the evolving nutritional needs of infants and toddlers.

Introduction

Welcome to the story of development from infancy through toddlerhood; from birth until about two years of age. Researchers have given this part of the life span more attention than any other period, perhaps because changes during this time are so dramatic and so noticeable and perhaps because we have assumed that what happens during these years provides a foundation for one's life to come. However, it has been argued that the significance of development during these years has been overstated. Nevertheless, this is the period of life that contemporary educators, healthcare providers, and parents have focused on most heavily. We will examine growth and nutrition during infancy, as well as other prominent physical changes that take place during this time.

Figure 4.1 summary: This figure is a photograph. It depicts a newborn infant in a deep sleep, resting on a soft, textured surface. The image captures the infant in a side profile, emphasizing the peaceful expression and small features of the baby. The visual evidence indicates a state of complete relaxation and tranquility typical of a sleeping newborn.

Rapid Physical Changes

As mentioned in the previous chapter, the average newborn in the United States weighs about 7.5 pounds and is about 20 inches in length. After about a 5% weight loss in the first few days, there is a period of rapid growth. By the time an infant is 4 months old, it usually doubles in weight and by one year has tripled its birth weight. By age 2, the weight has quadrupled. The average length at one year is about 26 to 32 inches.

Two hormones are very important to this growth process. The first is Human Growth Hormone (H.G.H) which influences all growth except that in the Central Nervous System (C.N.S). The hormone influencing growth in the C.N.S is called Thyroid Stimulating Hormone. Together these hormones influence the growth in early childhood.

Sleep is very important to the growth process as these hormones are released as children sleep each night. As a result, children need 11 to 14 hours of sleep from 2 to 6 years old. Parents may establish rituals, such as reading a story, taking a bath, brushing teeth, etcetera to help children wind down and get the sleep they so desperately need.

Figure 4.2 summary: This figure is a photograph. It depicts a young infant fast asleep, wrapped in blankets. The image captures the infant in a resting state, showing closed eyes and a relaxed facial expression. The photograph serves as a visual representation of a sleeping infant.

Proportions of the Body

Another dramatic physical change that takes place in the first several years of life is the change in body proportions. The head initially makes up about 50 percent of our entire length when we are developing in the womb. At birth, the head makes up about 25 percent of our length (think about how much of your length would be head if the proportions were still the same!). By age 25 it comprises about 20 percent our length. Imagine now how difficult it must be to raise one's head during the first year of life! And indeed, if you have ever seen a 2 to 4 month old infant lying on the stomach trying to raise the head, you know how much of a challenge this is. The comparison in this graphic was originally introduced in the last chapter.

Some of the most dramatic physical change that occurs during this period is in the brain. At birth, the brain is about 25 percent its adult weight and this is not true for any other part of the body. By age 2, it is at 75 percent its adult weight, at 95 percent by age 6 and at 100 percent by age 7 years.

While most of the brain's 100 to 200 billion neurons are present at birth, they are not fully mature and during the next several years dendrites or connections between neurons will undergo a period of tran-zee-unt exuberance or temporary dramatic growth.

There is a proliferation of these dendrites during the first two years so that by age 2, a single neuron might have thousands of dendrites. After this dramatic increase, the neural pathways that are not used will be eliminated thereby making those that are used much stronger. Because of this proliferation of dendrites, by age two a single neuron might have thousands of dendrites.

Synaptogenesis, or the formation of connections between neurons, continues from the prenatal period forming thousands of new connections during infancy and toddlerhood. This period of rapid neural growth is referred to as Synaptic Blooming. This activity is occurring primarily in the cortex or the thin outer covering of the brain involved in voluntary activity and thinking.

The prefrontal cortex that is located behind our forehead continues to grow and mature throughout childhood and experiences an additional growth spurt during adolescence. It is the last part of the brain to mature and will eventually comprise 85 percent of the brain's weight. Experience will shape which of these connections are maintained and which of these are lost.

Ultimately, about 40 percent of these connections will be lost. As the prefrontal cortex matures, the child is increasingly able to regulate or control emotions, to plan activity, strategize, and have better judgment. Of course, this is not fully accomplished in infancy and toddlerhood, but continues throughout childhood and adolescence.

Another major change occurring in the central nervous system is the development of myelin, a coating of fatty tissues around the axon of the neuron. Myelin helps insulate the nerve cell and speed the rate of transmission of impulses from one cell to another. This enhances the building of neural pathways and improves coordination and control of movement and thought processes. The development of myelin continues into adolescence but is most dramatic during the first several years of life.

Figure 4.3 summary: This figure is a series of illustrative diagrams. It depicts the evolution of human body proportions across different developmental stages, specifically from birth through early childhood, adolescence, and into young adulthood. The diagrams demonstrate a clear shift in physical proportions over time, showing that the head is disproportionately large relative to the body at birth and becomes smaller in proportion as the individual matures. Simultaneously, the limbs and torso lengthen and the overall body shape becomes more slender and elongated as the person grows toward adulthood.

Figure 4.4 summary: This figure is a labeled diagram. It illustrates the anatomical structure of a neuron, identifying key components such as the cell body, dendrites, axon, myelin sheath, and terminal buttons. The diagram shows the relationship between these parts and describes their functions, including the reception of messages via dendrites and the transmission of electrical signals, known as action potentials, along the axon to other cells. Based on the layout, it can be inferred that neurons are specialized for unidirectional communication, where signals are received at one end and transmitted through a long projection to reach a target cell, with the myelin sheath serving to enhance the speed of this transmission.

Reflexes

Infants are equipped with a number of reflexes which are involuntary movements in response to stimulation. These include the sucking reflex (infants suck on objects that touch their lips automatically), the rooting reflex (which involves turning toward any object that touches the cheek), the palmar grasp (the infant will tightly grasp any object placed in its palm), and the dancing reflex (evident when the infant is held in a standing position and moves its feet up and down alternately as if dancing). These movements occur automatically and are signals that the infant is functioning well neurologically. Within the first several weeks of life these reflexes are replaced with voluntary movements or motor skills.

Infants and children grow and develop at a rapid pace during the first few years of life. The development of both gross and fine motor skills helps a child go from a completely dependent newborn to an independently functioning toddler in about a 3-year span.

Figure 4.5 summary: This figure consists of a series of medical imaging scans. The images display axial views of the human brain at various developmental stages, ranging from infancy to childhood. The sequence illustrates the progressive growth in overall brain size and the increasing complexity of internal brain structures, such as the ventricles and cortical folding, as the individual ages.

Table 4.1 - Some Common Infant Reflexes ^{171}

Table 4.1 summary: This table provides a comprehensive overview of various infant reflexes, pairing each reflex name with a descriptive explanation of the physical response and corresponding illustrative figures. It details involuntary reactions such as sucking, rooting, grasping, the Babinski response, the Moro reflex, the tonic neck pose, and stepping motions.

Figure 4.12 summary: This figure is a grayscale image. It depicts a small child wearing a diaper and a shirt, captured in a candid moment. The image suggests a scene of early childhood development, showing the child in a standing or stepping posture.

Gross Motor Skills

Voluntary movements involve the use of large muscle groups and are typically large movements of the arms, legs, head, and torso. They are referred to as gross motor skills (or large motor skills). These skills begin to develop first.

Examples include moving to bring the chin up when lying on the stomach, moving the chest up, rocking back and forth on hands and knees, and then crawling. But it also includes exploring an object with one's feet as many babies do as early as 8 weeks of age if seated in a carrier or other device that frees the hips. This may be easier than reaching for an object with the hands, which requires much more practice. And sometimes an infant will try to move toward an object while crawling and surprisingly move backward because of the greater amount of strength in the arms than in the legs!

This also tends to lead infants to pulling up on furniture, usually with the goal of reaching a desired object. Usually this will also lead to taking steps and eventually walking.

Physical Gross Motor Milestones

As stated above, children grow very quickly and meet physical milestones rapidly in the first few years of life. The following is a table of the major milestones (behaviors or physical skills seen in infants and children as they grow and develop that typically occur within normal range) that occur in children during those first formative years.

Table 4.2 summary: This table outlines the progression of gross motor milestones in children from infancy through early childhood. It illustrates a developmental trajectory moving from basic head and limb control in early months to more complex movements such as rolling, sitting, and crawling. As children age, their capabilities advance from supported standing and cruising to independent walking, running, climbing, and coordinated physical activities like kicking and throwing.

Fine Motor Skills

More exact movements of the feet, toes, hands, and fingers are referred to as fine motor skills (or small motor skills). These include the ability to reach and grasp an object in coordination with vision. Newborns cannot grasp objects voluntarily but do wave their arms toward objects of interest. At about 4 months of age, the infant is able to reach for an object, first with both arms and within a few weeks, with only one arm. Grasping an object involves the use of the fingers and palm, but no thumbs.

Use of the thumb comes at about 9 months of age when the infant is able to grasp an object using the forefinger and thumb. This is known as the pincer grip. This ability greatly enhances the ability to control and manipulate an object and infants take great delight in this newfound ability.

They may spend hours picking up small objects from the floor and placing them in containers. And as those objects will often next go into the mouth, caregivers must be vigilant about keeping items small enough to be choking hazards out of reach of little fingers. By 9 months, an infant can also watch a moving object, reach for it as it approaches and grab it. This is quite a complicated set of actions if we remember how difficult this would have been just a few months earlier.

Figure 4.13 summary: This figure is a photograph. It depicts a young child engaged in play, crawling through a sandy area next to a piece of playground equipment. The image illustrates an infant exploring their environment through tactile interaction with the sand.

Figure 4.14 summary: This figure is a photograph. It depicts a young child sitting in a high chair and attempting to eat using a spoon. The child has food around their mouth and is holding the utensil toward their open mouth. The image illustrates the developmental stage of an infant practicing self-feeding skills.

Physical Fine Motor Milestones

While fine motor skills are slower to develop (in accordance with proximodistal development), pretty remarkable progress is made in fine motor development during the first two years. As stated above, in the first few years of life children go from having no intentional fine motor control to being able to manipulate objects to play and learn, as well as beginning to care of themselves. The following is a table of the major milestones in fine motor development.

Table 4.3 summary: This table outlines the progression of fine motor milestones in children from infancy through early childhood. It illustrates a developmental shift from primitive reflexive grasping to increasingly complex coordinated movements, such as the transition from a whole-hand palmar grasp to a precise pincer grip. As children age, their abilities evolve from basic hand-eye coordination and object manipulation to more sophisticated self-care skills, artistic expression through scribbling, and the ability to construct structures with blocks.

Sensory Capacities

Throughout much of history, the newborn was considered a passive, disorganized being who possessed minimal abilities. William James, an early psychologist, had described the newborn's world as"a blooming, buzzing confusion,". However, current research techniques have demonstrated just how developed the newborn is with especially organized sensory and perceptual abilities.

Vision

The womb is a dark environment void of visual stimulation. Consequently, vision is the most poorly developed sense at birth and time is needed to build those neural pathways between the eye and the brain. Newborns typically cannot see further than 8 to 16 inches away from their faces (which is about the distance from the newborn's face to the mother/caregiver when an infant is breastfeeding/bottle-feeding). Their visual acuity is about 20/400, which means that an infant can see something at 20 feet that an adult with normal vision could see at 400 feet. Thus, the world probably looks blurry to young infants.

Because of their poor visual acuity, they look longer at checkerboards with fewer large squares than with many small squares. Infants' thresholds for seeing a visual pattern are higher than adults'. Thus, toys for infants are sometimes manufactured with black and white patterns rather than pastel colors because the higher contrast between black and white makes the pattern more visible to the immature visual system.

By about 6 months, infants' visual acuity improves and approximates adult 20/25 acuity.

When viewing a person's face, newborns do not look at the eyes the way adults do; rather, they tend to look at the chin—a less detailed part of the face. However, by 2 or 3 months, they will seek more detail when exploring an object visually and begin showing preferences for unusual images over familiar ones, for patterns over solids, for faces over patterns, and for three-dimensional objects over flat images. Newborns have difficulty distinguishing between colors, but within a few months they are able to discriminate between colors as well as adults do. Sensitivity to binocular depth cues, which require inputs from both eyes, is evident by about 3 months and continues to develop during the first 6 months. By 6 months, the infant can perceive depth perception in pictures as well. Infants who have experience crawling and exploring will pay greater attention to visual cues of depth and modify their actions accordingly.

Figure 4.15 summary: This figure is a photograph. It depicts an infant being fed with a baby bottle by an adult, with the infant gazing upward toward the person providing the nourishment. The image illustrates a moment of social interaction and eye contact between a caregiver and a child during a feeding session.

Hearing

The infant's sense of hearing is very keen at birth, and the ability to hear is evident as soon as the 7 superscript th month of prenatal development. In fact, an infant can distinguish between very similar sounds as early as one month after birth and can distinguish between a familiar and unfamiliar voice even earlier. Infants are especially sensitive to the frequencies of sounds in human speech and prefer the exaggeration of infant-directed speech, which will be discussed later. Additionally, infants are innately ready to respond to the sounds of any language, but some of this ability will be lost by 7 or 8 months as the infant becomes familiar with the sounds of a particular language and less sensitive to sounds that are part of an unfamiliar language.

Newborns also prefer their mother's voices over another female when speaking the same material. Additionally, they will register in yoo-tuh-roh specific information heard from their mother's voice. You may remember the Cat in the Hat study featured in the last chapter that illustrates this.

Touch and Pain

Immediately after birth, a newborn is sensitive to touch and temperature, and is also highly sensitive to pain, responding with crying and cardiovascular responses. Newborns who are circumcised, which is the surgical removal of the foreskin of the penis, without anesthesia experience pain as demonstrated by increased blood pressure, increased heart rate, decreased oxygen in the blood, and a surge of stress hormones. Research has demonstrated that infants who were circumcised without anesthesia experienced more pain and fear during routine childhood vaccines. Fortunately, local painkillers are now used during many circumcision.

Taste and Smell

Studies of taste and smell demonstrate that babies respond with different facial expressions, suggesting that certain preferences are innate. Newborns can distinguish between sour, bitter, sweet, and salty flavors and show a preference for sweet flavors. Newborns also prefer the smell of their mothers. An infant only 6 days old is significantly more likely to turn toward its own mother's breast pad than to the breast pad of another baby's mother, and within hours of birth an infant also shows a preference for the face of its own mother.

Infants seem to be born with the ability to perceive the world in an intermodal way; that is, through stimulation from more than one sensory modality. For example, infants who sucked on a pacifier with either a smooth or textured surface preferred to look at a corresponding (smooth or textured) visual model of the pacifier. By 4 months, infants can match lip movements with speech sounds and can match other audiovisual events.

Although sensory development emphasizes the afferent processes used to take in information from the environment, these sensory processes can be affected by the infant's developing motor abilities. Reaching, crawling, and other actions allow the infant to see, touch, and organize his or her experiences in new ways.

Nutrition

al needs change with age. Let's examine how caregivers should nourish children during the first years of life and some risks to nutrition that they should be aware of.

Figure 4.16 summary: This figure is a composite of photographs. It displays a series of facial expressions from infants in response to different taste stimuli, including a control group, sweet, sour, and bitter tastes. The images demonstrate that infants exhibit distinct facial reactions depending on the taste they experience, with sweet tastes generally eliciting more pleasant or neutral expressions, while sour and bitter tastes provoke clear signs of aversion or distress.

Breastfeeding

Breast milk is considered the ideal diet for newborns. Colostrum, the first breast milk produced during pregnancy and just after birth has been described as “liquid gold” (United States Department of Health and Human Services (U.S.D.H.H.S), 2011). It is very rich in nutrients and antibodies. Breast milk changes by the third to fifth day after birth, becoming much thinner, but containing just the right amount of fat, sugar, water and proteins to support overall physical and neurological development.

For most babies, breast milk is also easier to digest than formula. Formula fed infants experience more diarrhea and upset stomachs. The absence of antibodies in formula often results in a higher rate of ear infections and respiratory infections.

Children who are breastfed have lower rates of childhood leukemia, asthma, obesity, type 1 and 2 diabetes, and a lower risk of S.I.D.S. The U.S.D.H.H.S recommends that mothers breastfeed their infants until at least 6 months of age and that breast milk be used in the diet throughout the first year or two.

Figure 4.17 summary: This is a photograph. The image depicts a healthcare professional providing hands-on assistance to a new mother who is breastfeeding her infant. The nurse is guiding the process to ensure proper positioning and latch. The scene illustrates the importance of professional support and lactation guidance in the early stages of infant feeding to promote successful breastfeeding practices.

Maternal Benefits of Breastfeeding

Several recent studies have reported that it is not just babies that benefit from breastfeeding. Breastfeeding stimulates contractions in the mother's uterus to help it regain its normal size, and women who breastfeed are more likely to space their pregnancies further apart. Mothers who breastfeed are at lower risk of developing breast cancer, especially among higher risk racial and ethnic groups. Women who breastfeed have lower rates of ovarian cancer, reduced risk for developing Type 2 diabetes, and rheumatoid arthritis. In most studies these benefits have been seen in women who breastfeed longer than 6 months.

Challenges to Breastfeeding

However, most mothers who breastfeed in the United States stop breastfeeding at about 6 to 8 weeks, often in order to return to work outside the home. Mothers can certainly continue to provide breast milk to their babies by expressing and freezing the milk to be bottle-fed at a later time or by being available to their infants at feeding time. However, some mothers find that after the initial encouragement they receive in the hospital to breastfeed, the outside world is less supportive of such efforts. Some workplaces support breastfeeding mothers by providing flexible schedules and welcoming infants, but many do not. In addition, not all women may be able to breastfeed. Women with H.I.V are routinely discouraged from breastfeeding as the infection may pass to the infant. Similarly, women who are taking certain medications or undergoing radiation treatment may be told not to breastfeed.

Cost of Breastfeeding

In addition to the nutritional benefits of breastfeeding, breast milk does not have to be purchased. Anyone who has priced formula recently can appreciate this added incentive to breastfeeding. Prices for a year's worth of formula and feeding supplies can cost well over $1,500 (U.S.D.H.H.S, 2011).

But there are also those who challenge the belief that breast milk is free. For breastmilk to be completely beneficial for infants the mother's life choices will ultimately affect the quality of the nutrition an infant will receive. Let's consider the nutritional intake of the mother. Breastfeeding will both limit some food and drink choices as well as necessitate an increased intake of healthier options.

A simple trip down the supermarket aisles will show you that nutritious and healthier options can be more expensive than some of the cheaper more processed options. A large variety of vegetable and fruits must be consumed, accompanied by the right proportions and amounts of the whole grains, dairy products, and fat food groups. Additionally, it is also encouraged for breastfeeding mothers to take vitamins regularly. That raises the question of how free breastfeeding truly is.

A Historic Look at Breastfeeding

The use of wet nurses, or lactating women hired to nurse others' infants, during the middle ages eventually declined and mothers increasingly breastfed their own infants in the late 1800s. In the early part of the 20 ^{th} century, breastfeeding began to go through another decline. By the 1950s, it was practiced less frequently as formula began to be viewed as superior to breast milk.

In the late 1960s and 1970s, greater emphasis began to be placed on natural childbirth and breastfeeding and the benefits of breastfeeding were more widely publicized. Gradually rates of breastfeeding began to climb, particularly among middle-class educated mothers who received the strongest messages to breastfeed.

Today, women receive consultation from lactation specialists before being discharged from the hospital to ensure that they are informed of the benefits of breastfeeding and given support and encouragement to get their infants to get used to taking the breast. This does not always happen immediately and first time mothers, especially, can become upset or discouraged. In this case, lactation specialists and nursing staff can encourage the mother to keep trying until baby and mother are comfortable with the feeding.

Alternatives to Breastfeeding

There are many reasons that mothers struggle to breastfeed or should not breastfeed, including: low milk supply, previous breast surgeries, illicit drug use, medications, infectious disease, and inverted nipples. Other mothers choose not to breastfeed. Some reasons for this include: lack of personal comfort with nursing, the time commitment of nursing, inadequate or unhealthy diet, and wanting more convenience and flexibility with who and when an infant can be fed. For these mothers and infants, formula is available. Besides breast milk, infant formula is the only other milk product that the medical community considers nutritionally acceptable for infants under the age of one year (as opposed to cow's milk, goat's milk, or follow-on formula). It can be used in addition to breastfeeding (supplementing) or as an alternative to breastmilk.

In the most commonly used infant formulas contain purified cow's milk whey and casein as a protein source, a blend of vegetable oils as a fat source, lactose as a carbohydrate source, a vitamin-mineral mix, and other ingredients depending on the manufacturer. In addition, there are infant formulas which use soybeans as a protein source in place of cow's milk (mostly in the United States and Great Britain) and formulas which use protein hydrolysed into its component amino acids for infants who are allergic to other proteins.

One early argument given to promote the practice of breastfeeding was that it promoted bonding and healthy emotional development for infants. However, this does not seem to be the case. Breastfed and bottle-fed infants adjust equally well emotionally. This is good news for mothers who may be unable to breastfeed for a variety of reasons and for fathers who might feel left out.

Figure 4.18 summary: This figure is a photograph. It depicts a father holding an infant and providing nourishment via a feeding bottle. The image illustrates a common caregiving interaction between a parent and a child, highlighting the process of bottle-feeding.

When, What, and How to Introduce Solid Foods

The American Academy of Pediatrics recommends children be introduced to foods other than breast milk or infant formula when they are about 6 months old. Every child is different. Here are some signs that show that an infant is ready for foods other than breast milk or infant formula:

Child can sit with little or no support.

• Child has good head control.

• Child opens his or her mouth and leans forward when food is offered.

How Should Foods Be Introduced?

The American Academy of Pediatrics says that for most children, foods do not need to be given in a certain order. Children can begin eating solid foods at about 6 months old. By the time they are 7 or 8 months old, children can eat a variety of foods from different food groups. These foods include infant cereals, meat or other proteins, fruits, vegetables, grains, yogurts and cheeses, and more.

If feeding infant cereals, it is important to offer a variety of fortified infant cereals such as oat, barley, and multi-grain instead of only rice cereal. The Food and Drug Administration does not recommend only providing infant rice cereal because there is a risk for children to be exposed to arsenic.

Children should be allowed to try one food at a time at first and there should be 3 to 5 days before another food is introduced. This helps caregivers see if the child has any problems with that food, such as food allergies.

The eight most common allergenic foods are milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybeans. It is no longer recommended that caregivers delay introducing these foods to all children, but if there is a family history of food allergies, the child's doctor or nurse should be consulted.

It may take numerous attempts before a child gains a taste for it. So caregivers should not give up if a food is refused on first offering.

Figure 4.19 summary: This figure is a photograph. It depicts an infant seated in a high chair while an adult uses a spoon to feed the child solid food. The infant is wearing a bib and has food residue around the mouth. The image illustrates the process of introducing complementary foods to a baby's diet, showing a typical feeding interaction between a caregiver and a child.

U.S.D.A Infant Meal Patterns

The United States Department of Agriculture Food and Nutrition Service provides the following guidance for the day time feeding of infants and toddlers.

Infant Meal Patterns

Table 4.4

The nutrition recommendations for toddlers are on the following page.

Table 4.4 summary: Dietary recommendations increase in variety and volume as infants age. While the youngest infants rely exclusively on breastmilk or formula across all meals, older infants transition to larger fluid portions supplemented with a diverse range of solid foods, including proteins, dairy, grains, fruits, and vegetables.

Table 4.5 summary: This table outlines the recommended dietary portions for children aged one to two years across different meal types. It specifies a combination of milk, produce, and grains for breakfast, while lunch and supper include an additional protein component. Snacks are more flexible, allowing for a selection of various food groups.

Child Malnutrition

There can be serious effects for children when there are deficiencies in their nutrition. Let's explore a few types of nutritional concerns.

Wasting

Children in developing countries and countries experiencing the harsh conditions of war are at risk for two major types of malnutrition, also referred to as wasting. Infantile marasmus refers to starvation due to a lack of calories and protein. Children who do not receive adequate nutrition lose fat and muscle until their bodies can no longer function. Babies who are breastfed are much less at risk of malnutrition than those who are bottle-fed.

After weaning, children who have diets deficient in protein may experience kwashiorkor or the “disease of the displaced child,” often occurring after another child has been born and taken over breastfeeding. This results in a loss of appetite and swelling of the abdomen as the body begins to break down the vital organs as a source of protein.

Around the world the rates of wasting have been dropping. However, according to the World Health Organization and unicef, in 2014 there were 50 million children under the age of five that experienced these forms of wasting, and 16 million were severely wasted. Worldwide, these figures indicate that nearly 1 child in every 13 suffers from some form of wasting. The majority of these children live in Asia (34.3 million) and Africa (13.9 million). Wasting can occur as a result of severe food shortages, regional diets that lack certain proteins and vitamins, or infectious diseases that inhibit appetite (Latham, 1997).

The consequences of wasting depend on how late in the progression of the disease parents and guardians seek medical treatment for their children. Unfortunately, in some cultures families do not seek treatment early, and as a result by the time a child is hospitalized the child often dies within the first three days after admission. Several studies have reported long-term cognitive effects of early malnutrition, even when home environments were controlled. Lower I.Q scores, poor attention, and behavioral issues in the classroom have been reported in children with a history of serious malnutrition in the first few years of life.

Figure 4.20 summary: This figure is a photograph. It depicts a young child sitting on a wooden bench, showing extreme thinness in the limbs and upper body contrasted with a protruding abdomen. The image illustrates the physical manifestations of wasting, characterized by severe muscle loss and malnutrition.

Milk Anemia

Milk Anemia in the United States: About 9 million children in the United States are malnourished. More still suffer from milk anemia, a condition in which milk consumption leads to a lack of iron in the diet. This can be due to the practice of giving toddlers milk as a pacifier-when resting, when riding, when waking, and so on. Appetite declines somewhat during toddlerhood and a small amount of milk (especially with added chocolate syrup) can easily satisfy a child's appetite for many hours. The calcium in milk interferes with the absorption of iron in the diet as well. Many preschools and daycare centers give toddlers a drink after they have finished their meal in order to prevent spoiling their appetites.

Failure to Thrive

Failure to thrive (F.T.T) occurs in children whose nutritional intake is insufficient for supporting normal growth and weight gain. F.T.T typically presents before two years of age, when growth rates are highest. Parents may express concern about picky eating habits, poor weight gain, or smaller size compared to peers of similar age. Physicians often identify F.T.T during routine office visits, when a child's growth parameters are not tracking appropriately on growth curves.

F.T.T can be caused by physical or mental issues within the child (such as errors of metabolism, acid reflux, anemia, diarrhea, Cystic fibrosis, Crohn's disease, celiac disease, cleft palate, tongue tie, milk allergies, hyperthyroidism, congenital heart disease, etcetera) It can also be caused by caregiver's actions (environmental), including inability to produce enough breastmilk, inadequate food supply, providing an insufficient number of feedings, and neglect. These causes may also co-exist. For instance, a child who is not getting sufficient nutrition may act content so that caregivers do not offer feedings of sufficient frequency or volume, and a child with severe acid reflux who appears to be in pain while eating may make a caregiver hesitant to offer sufficient feedings.

Health

Infants depend on the adults that care for them to promote and protect their health. The following section addresses common physical conditions that can affect infants, the danger of shaking babies, and the importance of immunizations.

Common Physical Conditions and Issues during Infancy

Some physical conditions and issues are very common during infancy. Many are normal, and the infant's caregivers can deal with them if they occur. Mostly, it is a matter of the caregivers learning about what is normal for their infant and getting comfortable with the new routine in the household. New parents and caregivers often have questions about the following:

Bowel Movements

• Colic

Diaper Rash

• Spitting Up/Vomiting

• Teething

• Urination

Jaundice

Bowel Movements

Infants' bowel movements go through many changes in color and consistency, even within the first few days after birth. While the color, consistency, and frequency of stool will vary, hard or dry stools may indicate dehydration and increased frequency of watery stools may indicate diarrhea.

Colic

Many infants are fussy in the evenings, but if the crying does not stop and gets worse throughout the day or night, it may be caused by colic. According to the American Academy of Pediatrics, about one-fifth of all infants develop colic, usually starting between 2 and 4 weeks of age. They may cry inconsolably or scream, extend or pull up their legs, and pass gas. Their stomachs may be enlarged. The crying spells can occur anytime, although they often get worse in the early evening.

The colic will likely improve or disappear by the age of 3 or 4 months. There is no definite explanation for why some infants get colic. Health care providers can help ensure there is no medical reason behind the crying.

Some infants seem to be soothed by being held, rocked, or wrapped snugly in a blanket. Some like a pacifier.

Shaken Baby Syndrome

Here is a P.S.A from the Center for Disease Control (C.D.C)

The crying.

The late-night feedings.

The diaper changes.

The exhaustion.

If you've ever been around a baby who won't stop crying, you know there's potential to get frustrated. Focus on calming yourself and understand that you may not be able to calm your baby. It's not your fault or your baby's.²⁰³

It's normal for healthy babies to cry and some babies cry much more than others. And they cannot always be consoled and caregivers can feel pushed to the limit. When caregivers lose control and shake a baby it can have devastating effects.

Shaken Baby Syndrome (S.B.S) is a severe form of physical child abuse. S.B.S may be caused from vigorously shaking an infant by the shoulders, arms, or legs. The “whiplash” effect can cause intracranial (within the brain) or intraocular (within the eyes) bleeding. Often there is no obvious external head trauma. Still, children with S.B.S may display some outward signs:

Change in sleeping pattern or inability to be awakened

Confused, restless, or agitated state

• Convulsions or seizures

Loss of energy or motivation

Slurred speech

Uncontrollable crying

Inability to be consoled

Inability to nurse or eat

S.B.S can result in death, mental retardation or developmental delays, paralysis, severe motor dysfunction, spasticity, blindness, and seizures.

Figure 4.21 summary: This figure is a photograph. It depicts a newborn infant lying on a soft surface while an adult's hands hold the baby's legs upward. The scene illustrates the process of a caregiver changing an infant's diaper. The image captures a common caregiving interaction, highlighting the vulnerability of the infant and the supportive role of the adult.

Figure 4.22 summary: This figure is a black and white photograph. It depicts a man wearing glasses and holding a camera, while cradling an infant in his arms. The infant appears to be crying. The image captures a candid domestic moment between a father and his child.

Who's at Risk?

Small children are especially vulnerable to this type of abuse. Their heads are large in comparison to their bodies, and their neck muscles are weak. Children under one year of age are at highest risk, but S.B.S has been reported in children up to five years of age. Shaking often occurs in response to a baby crying or having a toilet-training accident. The perpetrator tends to be male and is primarily the biological father or the mother's boyfriend or partner. Caregivers are responsible for about 9%-21% of cases. The explanation typically provided by the caregiver—"I was playing with the baby"—does not begin to account for the severity of trauma. Many times there is also a history of child abuse.

Can It Be Prevented?

S.B.S is completely preventable. However, it is not known whether educational efforts will effectively prevent this type of abuse. Home visitation programs are shown to prevent child abuse in general. Because the child's father or the mother's partner often causes S.B.S, they should be included in home visitation programs. Home visits bring community resources to families in their homes. Health professionals provide information, healthcare, psychological support, and other services that can help people to be more effective parents and care-givers.

The Bottom Line

- Shaking a baby can cause death or permanent brain damage. It can result in life-long disability.

- Healthy strategies for dealing with a crying baby include:

- ☐ finding the reason for the crying

- checking for signs of illness or discomfort, such as diaper rash, teething, tight clothing;

- feeding or burping;

- soothing the baby by rubbing its back; gently rocking; offering a pacifier; singing or talking;

- ☐ taking a walk using a stroller or a drive in a properly-secured car seat;

- ☐ or calling the doctor if sickness is suspected

- All babies cry. Caregivers often feel overwhelmed by a crying baby. Calling a friend, relative, or neighbor for support or assistance lets the caregiver take a break from the situation. If immediate support is not available, the caregiver could place the baby in a crib (making sure the baby is safe), close the door, and check on the baby every five minutes.

Figure 4.23 summary: This figure is a photograph. It depicts a group of medical professionals in a clinical setting providing specialized care to an infant. The infant is lying on a medical surface and is connected to various monitoring and support equipment. The healthcare providers are wearing protective gear and are focused on the infant's condition. The scene indicates a high level of medical attention and collaborative effort required for neonatal care in a healthcare environment.

Abusive Head Trauma

Shaken baby syndrome is part abusive head trauma (A.H.T), severe form of physical child abuse that results in an injury to the brain of a child. This is important to note because:

- Abusive head trauma is a leading cause of physical child abuse deaths in children under 5 in the United States.

- Abusive head trauma accounts for approximately one third of all child maltreatment deaths.

- The most common trigger for abusive head trauma is inconsolable crying.

- Babies less than one year old are at greatest risk of injury from abusive head trauma. 206

Teething

Although newborns usually have no visible teeth, baby teeth begin to appear generally about 6 months after birth. During the first few years, all 20 baby teeth will push through the gums, and most children will have their full set of these teeth in place by age 3.

An infant's front four teeth usually appear first, at about 6 months of age, although some children don't get their first tooth until 12 to 14 months. As their teeth break through the gums, some infants become fussy, and irritable; lose their appetite; or drool more than usual.

The F.D.A does not recommend gum-numbing medications with an ingredient called benzocaine because they can cause a potentially fatal condition in young children. Safe forms of relief include a chilled teething ring or gently rubbing the child's gums with a clean finger.

Spitting Up/Vomiting

Spitting up is a common occurrence for young infants and is usually not a sign of a more serious problem. But if an infant is not gaining weight or shows other signs of illness, a health care provider should be consulted.

Figure 4.24 summary: This figure is a photograph. It depicts a father holding an infant over his shoulder, with a protective cloth placed between the baby and the father's clothing. The image illustrates a practical measure taken to prevent clothing from becoming soiled by infant spit-up.

Urination

Inants urinate as often as every 1 to 3 hours or as infrequently as every 4 to 6 hours. In case of sickness or if the weather is very hot, urine output might drop by half and still be normal. If an infant shows any signs of distress while urinating or if any blood is found in a wet diaper medical care should be sought.

Diaper Rash

A rash on the skin covered by a diaper is quite common. It is usually caused by irritation of the skin from being in contact with stool and urine. It can get worse during bouts of diarrhea. Diaper rash usually can be prevented by frequent diaper changes.

Jaundice

Jaundice can cause an infant's skin, eyes, and mouth to turn a yellowish color. The yellow color is caused by a buildup of bilirubin, a substance that is produced in the body during the normal process of breaking down old red blood cells and forming new ones.

Normally the liver removes bilirubin from the body. But, for many infants, in the first few days after birth, the liver is not yet working at its full power. As a result, the level of bilirubin in the blood gets too high, causing the infant's color to become slightly yellow—this is jaundice. Although jaundice is common and usually not serious, in some cases, high levels of bilirubin could cause brain injury.

All infants with jaundice need to be seen by a health care provider. Many infants need no treatment. Their livers start to catch up quickly and begin to remove bilirubin normally, usually within a few days after birth. For some infants, health care providers prescribe phototherapy—a treatment using a special lamp—to help break down the bilirubin in their bodies.

Figure 4.25 summary: This figure is a clinical photograph. It depicts a newborn infant lying in a medical setting, equipped with various monitoring devices and medical tubing, while undergoing a therapeutic procedure. The image illustrates the clinical application of phototherapy for an infant being treated for jaundice.

Protecting Health through Immunization

One way we can protect a child's health (and those around them) is through immunization. The vaccines (given through injection) may hurt a little…but the diseases they can prevent can hurt a lot more! Immunization shots, or vaccinations, are essential.

They protect against things like measles, mumps, rubella, hepatitis B, polio, diphtheria, tetanus and pertussis (whooping cough). Immunizations are important for adults as well as for children. Here's why.

The immune system helps the human body fight germs by producing substances to combat them. Once it does, the immune system “remembers” the germ and can fight it again. Vaccines contain germs that have been killed or weakened. When given to a healthy person, the vaccine triggers the immune system to respond and thus build immunity.

Before vaccines, people became immune only by actually getting a disease and surviving it. Immunizations are an easier and less risky way to become immune.

Vaccines are the best defense we have against serious, preventable, and sometimes deadly contagious diseases. Vaccines are some of the safest medical products available, but like any other medical product, there may be risks. Accurate information about the value of vaccines as well as their possible side effects helps people to make informed decisions about vaccination.

Potential Side Effects

Vaccines, like all medical products, may cause side effects in some people. Most of these side effects are minor, such as redness or swelling at the injection site. Read further to learn about possible side effects from vaccines.

Any vaccine can cause side effects. For the most part these are minor (for example, a sore arm or low-grade fever) and go away within a few days. Serious side effects after vaccination, such as severe allergic reaction, are very rare.

Remember, vaccines are continually monitored for safety, and like any medication, vaccines can cause side effects. However, a decision not to immunize a child also involves risk and could put the child and others who come into contact with him or her at risk of contracting a potentially deadly disease.

Figure 4.26 summary: This figure is a photograph. It depicts a healthcare professional, specifically a nurse, administering vaccinations to a newborn infant while a woman looks on. The image captures a medical procedure taking place in a clinical setting. The scene illustrates the practical application of preventative healthcare and the importance of early childhood immunization programs.

How Well Do Vaccines Work?

Vaccines work really well. No medicine is perfect, of course, but most childhood vaccines produce immunity about 90 to 100% of the time.

What about the argument made by some people that vaccines don't work that well . . . that diseases would be going away on their own because of better hygiene or sanitation, even if there were no vaccines?

That simply isn't true. Certainly better hygiene and sanitation can help prevent the spread of disease, but the germs that cause disease will still be around, and as long as they are they will continue to make people sick.

All vaccines must be licensed (approved) by the Food and Drug Administration (F.D.A) before being used in the United States, and a vaccine must go through extensive testing to show that it works and that it is safe before the F.D.A will approve it. Among these tests are clinical trials, which compare groups of people who get a vaccine with groups of people who get a control. A vaccine is approved only if F.D.A makes the determination that it is safe and effective for its intended use.

If you look at the history of any vaccine-preventable disease, you will virtually always see that the number of cases of disease starts to drop when a vaccine is licensed. Vaccines are the most effective tool we have to prevent infectious diseases.

Opposition to Vaccines

In 2010, a pertussis (whooping cough) outbreak in California sickened 9,143 people and resulted in 10 infant deaths: the worst outbreak in 63 years. Researchers, suspecting that the primary cause of the outbreak was the waning strength of pertussis vaccines in older children, recommended a booster vaccination for 11 to 12-year-olds and also for pregnant women. Pertussis is most serious for babies; one in five needs to be hospitalized, and since they are too young for the vaccine themselves, it is crucial that people around them be immunized. Several states, including California, have been requiring the pertussis booster for older children in recent years with the hope of staying off another outbreak.

But what about people who do not want their children to have this vaccine, or any other? That question is at the heart of a debate that has been simmering for years. Vaccines are biological preparations that improve immunity against a certain disease. Vaccines have contributed to the eradication and weakening of numerous infectious diseases, including smallpox, polio, mumps, chicken pox, and meningitis.

However, many people express concern about potential negative side effects from vaccines. These concerns range from fears about overloading the child's immune system to controversial reports about devastating side effects of the vaccines.

Although children continue to get several vaccines up to their second birthday, these vaccines do not overload the immune system. Every day, an infant's healthy immune system successfully fights off thousands of antigens – the parts of germs that cause their immune system to respond. Even if your child receives several vaccines in one day, vaccines contain only a tiny amount of antigens compared to the antigens your baby encounters every day.

This is the case even if your child receives combination vaccines. Combination vaccines take two or more vaccines that could be given individually and put them into one shot. Children get the same protection as they do from individual vaccines given separately—but with fewer shots.

One misapprehension is that the vaccine itself might cause the disease it is supposed to be immunizing against. Vaccines help develop immunity by imitating an infection, but this “imitation” infection does not cause illness. Instead it causes the immune system to develop the same response as it does to a real infection so the body can recognize and fight the vaccine-preventable disease in the future. Sometimes, after getting a vaccine, the imitation infection can cause minor symptoms, such as fever. Such minor symptoms are normal and should be expected as the body builds immunity.

Another commonly circulated concern is that vaccinations, specifically the M.M.R vaccine (M.M.R stands for measles, mumps, and rubella), are linked to autism. The autism connection has been particularly controversial. In 1998, a British physician named Andrew Wakefield published a study in Great Britain's Lancet magazine that linked the M.M.R vaccine to autism. The report received a lot of media attention, resulting in British immunization rates decreasing from 91 percent in 1997 to almost 80 percent by 2003, accompanied by a subsequent rise in measles cases. A prolonged investigation by the British Medical Journal proved that not only was the link in the study nonexistent, but that Dr. Wakefield had falsified data in order to support his claims. Dr. Wakefield was discredited and stripped of his license, but the doubt still lingers in many parents' minds.

In the United States, many parents still believe in the now discredited M.M.R-autism link and refuse to vaccinate their children. Other parents choose not to vaccinate for various reasons like religious or health beliefs. In one instance, a boy whose parents opted not to vaccinate returned home to the U.S. after a trip abroad; no one yet knew he was infected with measles. The boy exposed 839 people to the disease and caused 11 additional cases of measles, all in other unvaccinated children, including one infant who had to be hospitalized.

According to a study published in Pediatrics (2010), the outbreak cost the public sector 10,376 per diagnosed case. The study further showed that the intentional non-vaccination of those infected occurred in students from private schools, public charter schools, and public schools in upper-socioeconomic areas.

Figure 4.27 summary: This figure is a photograph. It depicts two young children who have contracted polio receiving physical therapy from a healthcare professional. The children are utilizing leg braces and parallel bars for support while interacting with a large ball. The image illustrates the rehabilitative efforts and medical interventions used to assist children with mobility impairments resulting from the disease.

Figure 4.28 summary: This figure is a clinical photograph. It depicts the face of an infant exhibiting a widespread skin rash consisting of numerous small, reddish spots across the forehead, cheeks, and chin. The visual evidence indicates a systemic skin eruption characteristic of a measles infection in a pediatric patient.

The Immunization Schedule

On-time vaccination throughout childhood is essential because it helps provide immunity before children are exposed to potentially life-threatening diseases. Vaccines are tested to ensure that they are safe and effective for children to receive at the recommended ages. Fully vaccinated children in the U.S. are protected against sixteen potentially harmful diseases. Vaccine-preventable diseases can be very serious, may require hospitalization, or even be deadly — especially in infants and young children.

Here is the schedule from the C.D.C to ensure a child is fully vaccinated:

Figure 4.29 summary: This figure is a timeline chart. It outlines the recommended immunization schedule for children from birth through six years of age, detailing the specific vaccines administered at various developmental milestones including birth, early infancy, toddlerhood, and early childhood. The chart shows that some vaccines are given in multiple doses over several months, while others are administered annually or as single boosters in later childhood. It can be inferred that the most intensive period for vaccinations occurs during the first two years of life to provide early protection, with certain boosters and annual shots continuing through early childhood to maintain immunity.

Figure 4.30 summary: This table outlines various vaccine-preventable diseases, identifying the corresponding vaccines, modes of transmission, common symptoms, and potential severe complications. Most of the listed diseases are spread through the air or direct contact, while others are transmitted via contaminated food, water, body fluids, or skin breaks. The complications range from organ failure and paralysis to permanent disability and death, highlighting the critical role of vaccination in preventing severe health outcomes.

Safety

There are different risks to infant safety. According to the C.D.C, nonfatal injury rates varied by age group.

- Nonfatal suffocation rates were highest for those less than 1 year of age.

• Rates for fires or burns, and drowning were highest for children 4 years and younger.

- Children 1 to 4 years of age had the highest rates of nonfatal falls and poisoning.

And the leading causes of injury death also differed by age group.

- For children less than 1 year of age, two-thirds of injury deaths were due to suffocation.

- Drowning was the leading cause of injury or death for those 1 to 4 years of age.

Car Seat Safety

Motor vehicle injuries are a leading cause of death among children in the United States. But many of these deaths can be prevented.

- In the United States, 723 children ages 12 years and younger died as occupants in motor vehicle crashes during 2016, and more than 128,000 were injured in 2016.

- One C.D.C study found that, in one year, more than 618,000 children ages 0 to 12 rode in vehicles without the use of a child safety seat or booster seat or a seat belt at least some of the time.

- Of the children ages 12 years and younger who died in a crash in 2016 (for which restraint use was known), 35% were not buckled up.

Buckling children in age-and size-appropriate car seats, booster seats, and seat belts reduces the risk of serious and fatal injuries:

- Car seat use reduces the risk for injury in a crash by 71 to 82% for children when compared to seat belt use alone.

- Booster seat use reduces the risk for serious injury by 45% for children aged 4 to 8 years when compared with seat belt use alone.

- For older children and adults, seat belt use reduces the risk for death and serious injury by approximately half.

Figure 4-31 summary: This figure is a timeline diagram combined with illustrative graphics. It displays a progression of age from birth through early adolescence, paired with different types of child safety seats and restraint systems. The sequence shows a transition from rear-facing car seats to forward-facing seats, then to booster seats, and finally to the use of a standard vehicle seat belt. This indicates that as a child grows older and larger, the recommended safety restraint system evolves from high-support, rear-facing protection to independent use of the vehicle's built-in safety belt.

Rear-Facing Car Seat

Birth until age 2 to 4

Buckle children in a rear-facing car seat until they reach the maximum weight or height limit of their car seat. Keep children rear-facing as long as possible.

Forward-Facing Car Seat

After outgrowing re- facing seat until at least age 5

When children outgrow their rear-facing car seat, they should be buckled in a forward-facing car seat until they reach the maximum weight or height limit of their car seat.

Booster Seat

After outgrowing forward-facing seat and until seat belts fit properly

Once children outgrow their forward-facing seat, they should be buckled in a booster seat until seat belts fit properly. Proper seat belt fit usually occurs when children are 4 feet 9 inches tall and age 9 to 12.

Seat Belt

Once seat belts fit properly without a booster seat

Children no longer need to use a booster seat once seat belts fit them properly. Seat belts fit properly when the lap belt lays across the upper thighs (not the stomach) and the shoulder belt lays across the chest (not the neck).

Keep children ages 12 and under properly buckled in the back seat. Never place a rear-facing car seat in front of an active air bag.

Sleep

Figure 4.31 – The different types of car seats based on age. 226

A newborn typically sleeps approximately 16.5 hours per 24-hour period. This is usually polyphasic sleep in that the infant is accumulating the 16.5 hours over several sleep periods. throughout the day. The infant is averaging 15 hours per 24-hour period by one month, and 14 hours by 6 months. By the time children turn two, they are averaging closer to 10 hours per 24 hours. Additionally, the average newborn will spend close to 50% of the sleep time in the Rapid Eye Movement (R.E.M) phase, which decreases to 25% to 30% in childhood.

Sudden Infant Death Syndrome and Safe Sleep

Sudden Infant Death Syndrome (S.I.D.S) is identified when the death of a healthy infant occurs suddenly and unexpectedly, and medical and forensic investigation findings (including an autopsy) are inconclusive. S.I.D.S is the leading cause of death in infants 1 to 12 months old, and approximately 1,500 infants died of S.I.D.S in 2013 (C.D.C, 2015). Because S.I.D.S is diagnosed when no other cause of death can be determined, possible causes of S.I.D.S are regularly researched. One leading hypothesis suggests that infants who die from S.I.D.S have abnormalities in the area of the brainstem responsible for regulating breathing.

Risk Factors

Babies are at higher risk for S.I.D.S if they:

- Sleep on their stomachs

- Sleep on soft surfaces, such as an adult mattress, couch, or chair or under soft coverings

- Sleep on or under soft or loose bedding

- Get too hot during sleep

- Are exposed to cigarette smoke in the womb or in their environment, such as at home, in the car, in the bedroom, or other areas

- Sleep in an adult bed with parents, other children, or pets; this situation is especially dangerous if:

- The adult smokes, has recently had alcohol, or is tired.

- The baby is covered by a blanket or quilt.

- The baby sleeps with more than one bed-sharer.

- ☐ The baby is younger than 11 to 14 weeks of age.

Figure 4.33 summary: This figure is a photograph. It depicts an infant lying on their back on a flat mattress within a crib, while an adult's hand rests gently on the baby's head. The image illustrates a scenario of a baby sleeping in a secure environment, demonstrating safe sleep practices.

Reducing the Risks

There have been dramatic improvements in reducing baby deaths during sleep since the 1990s, when recommendations were introduced to place babies on their back for sleep. However, since the late 1990s, declines have slowed.

In 2012, the Back to Sleep campaign became the Safe to Sleep campaign. Safe to Sleep aims to educate all caregivers about S.I.D.S and safe sleep practices. Current recommendations to reduce the risk of S.I.D.S and other sleep related causes of infant death:

- Always place baby on his or her back to sleep (for naps and at night).

- Use a firm and flat surface.

- Use only a tight fitting sheet on the sleep surface; no other bedding or soft items in the sleep area.

- Breastfeed.

- Share your room with a baby, but on a separate surface designed for infants (not your bed).

- Do not put soft objects, toys, crib bumpers, or loose bedding under, over, or anywhere near baby's sleep area.

- Do no smoke during pregnancy or allow smoking around baby.

- Consider giving baby a pacifier.

- Do not let baby get too hot during sleep.

• Get regular health care (including vaccines).

- Avoid products that go against safe sleep recommendations, especially those that claim to prevent or reduce the risk of S.I.D.S.

Figure 4.32 summary: This figure is a line chart. It displays the number of sleep-related infant deaths per a specific number of live births over a period spanning several decades. The data shows a significant downward trend in infant deaths from the start of the period until the mid-nineties, followed by a period of relative stability with minor fluctuations. It can be inferred that there has been a substantial overall reduction in sleep-related infant mortality over the observed timeframe.

Conclusion

In this chapter we looked at:

• Physical changes during the first two years

• Some common infant reflexes

• How fine and gross motor skills develop

• Sensory capacities during the first two years

• Health and safety for infants and toddlers

- The sleep needs during the first two years and ways to reduce the risk of S.I.D.S

In the next chapter we are going to be taking a closer look at theories that help us explain the cognitive and language development during infancy and toddlerhood.

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