Ch 3 - Health Promotion for Infants (2 days to 1 year)

Growth and Measurements

• Head circumference (HC) averages: 33-35 cm (13-14 in)

• Crown to rump length: 31-35 cm (12.5-14 in) approximately equal to head circumference

• Length (head to heell length): 48-53 cm (19-21 in)

• Weight: 2700-4000 g (6-9 lb)

Weight and Feeding Milestones

• Weight: 6-9 lb

• Early weight loss: infants may lose up to 10% of birth weight in first 3-4 days due to fluid shifts, meconium loss, and limited intake (especially with breastfeeding).

• Birth weight rebound: birth weight usually regained by days $10\text{ to } 14$, depending on feeding method.

• Weight growth in first months: approx. $680\text{ g}\approx1.5\text{ lb}$ per month for the first five months.

• 6 months weight: $7.26\text{ kg}\approx16\text{ lb}$

• 12 months weight: birth weight is typically at least doubled by ~5 months and tripled by ~12 months; average $9.75\text{ kg}\approx21.5\text{ lb}$

Growth in Height and Head Circumference

• Height growth: approx. $2.5\text{ cm per month}$ in the first six months (i.e., rapid linear growth early on).

• Growth spurts: occur after age six months; birth length increases by about $50\%$ by age 12 months

• Head circumference growth: overall HC increases approximately $2.0\text{ cm}$ in the first 3 months, i.e., about $0.75\text{ cm per month}$. From months 4–6, HC grows by about $1.0\text{ cm}$ total, roughly $0.25\ to\ 0.40\text{ cm per month}$. In the second six months (months 7–12), HC grows about $0.5\text{ cm}$ total, approx. $0.08\ to\ 0.20\text{ cm per month}$.

Dental Development and Teething Care

• Teething onset: first teeth typically erupt between $6\text{ and }10\text{ months}$; average age around $8\text{ months}$.

• Common signs: sucking/ biting on fingers or objects, drooling, irritability, sleep difficulties, mild fever, ear rubbing, decreased appetite for solids.

• Teething relief:

  • Use frozen teething rings or an ice cube wrapped in a washcloth.

  • Topical anesthetic gels available but use under health‑care provider guidance.

  • Acetaminophen and/or ibuprofen may be used for pain/discomfort, but limit to no more than $3\text{ days}$; ibuprofen only for infants > $6\text{ months}$.

• Feeding guidance during teething: clean infant mouths; avoid bottle use when falling asleep to reduce risk of early childhood caries.

Developmental Milestones by Age (Motor, Language, Social)

• Two months

  • Motor: demonstrates head lag; (later) holds head up briefly when prone; moves bilateral extremities; opens hands briefly; grasp reflex fading; watches movement; reaches for objects.

  • Language/Communication: cries and makes sounds; startles to loud noises; calms when picked up; smiles in response to voice; social/interaction: coos; responds to familiar voices.

• Four months

  • Motor: pushes up onto elbows in prone; holds head up when held; pushes up with chest when prone; regards hands and toys; begins to bear weight with forearms.

  • Social/Cognitive: smiles; enjoys social interaction; coos; vocalizes with variety of sounds; responds to voice.

• Six months

  • Motor: rolls from front to back; sits with support and begins to sit with forward support; reaches for and grasps objects with both hands; transfers objects hand to hand; explores with mouth.

  • Language/Social: responds to own name; babbles with vowel and consonant sounds; notices self in mirror; enjoys reciprocal play; responds to sounds and voices.

• Seven to eight months

  • Motor: masters sitting with some support; transfers objects between hands; begins to crawl or crawl with pivot; begins to use raking grasp; bangs objects together; plays with toys at a distance.

  • Social/Cognitive: enjoys looking at self in mirror; recognizes familiar people; enjoys simple games (peekaboo); communicative sounds increase.

• Nine to ten months

  • Motor: starts to crawl on hands and knees; pulls to stand; stands with help; superior pincer grasp developing; uses fingers to explore objects; looks for dropped or hidden objects.

  • Language/Social: uses longer syllables; begins to respond to own name; uses simple gestures; looks at caregiver for cues; begins to understand simple commands with gestures.

• Eleven to twelve months

  • Motor: may walk with assistance; may stand alone briefly; places objects into containers; throws objects; manipulates toys with refined fine motor skills.

  • Language/Social: imitates sounds; may say one or more words with meaning; understands simple commands; social engagement increases; separation and stranger awareness begin to emerge.

• Developmental framework notes

  • Piaget (sensorimotor stage, Birth to 24 months): infants progress from reflexive actions to symbolic, repetitive, and imitative activities; key tasks include separation, object permanence, and mental representation.

  • Separation, Object Permanence, Mental Representation

  • Separation: learning to differentiate self from the environment; typically develops through the first year.

  • Object permanence: understanding that objects exist even when not visible; appears around: $9\text{ to }10\text{ months}$.

  • Mental representation: ability to recognize and use symbols; develops in the sensorimotor period.

  • Language development: crying is the first form of verbal communication; crying peaks early and gradually decreases as speech-like sounds emerge.

  • Erikson: Trust vs Mistrust (birth to 1 year). Trust is built through consistent care, feeding, stimulation, and comfort; failure to meet needs or inconsistent care leads to mistrust and possible impact on future relationships. Delayed gratification is learned here.

Social and Attachment Development

• Social development is initially influenced by reflexive behaviors and includes: attachment, separation, recognition, anxiety, and stranger fear.

• Attachment: bond with parents, begins in the first month and is strengthened by healthy feeding experiences, rest, and caregiver responsiveness.

• Separation-individuation: infants begin to distinguish themselves from their primary caregiver as separate individuals within the first year; object permanence develops alongside.

• Separation anxiety: typically begins around $4\text{ to }8\text{ months}$; infants protest when separated, causing parental anxiety.

• Stranger fear: evident between $6\text{ and }8\text{ months}$ as infants discriminate familiar from unfamiliar people.

• Reactive attachment disorder: results from maladaptive or absent attachment between infant and caregiver and can persist into later childhood and adulthood.

• STOH (safety considerations in social/interaction context) and body image changes: infants learn through play that mouths are pleasure producers and hands/feet are objects of play; smiles trigger caregiver responses.

Play, Stimulation, and Developmental Promotion

• Age-appropriate play should provide interpersonal content and educational stimulation.

• Infants have short attention spans and often engage in solitary play; recommended stimulating toys and activities include: rattles, soft stuffed toys, teething toys, nesting toys, pat-a-cat toys, balls, reading books, mirrors, brightly colored toys, blocks.

• On-screen activities: developmental milestones video and motor skill progression by age ranges are provided; click-through age ranges to view expected skills.

Health Promotion and Discharge Planning

• Immunizations (CDC recommendations for healthy infants < 12 months):

  • Birth: Hepatitis B (Hep B)

  • 2 months: DTaP, RV, IPV, Hib, PCV, Hep B

  • 4 months: DTaP, RV, IPV, Hib, PCV

  • 6 months: DTaP, RV, IPV, Hib, PCV, Hep B

  • 6 to 18 months: Hep B, PCV, Hib, RV (as per schedule), plus influenza yearly when eligible

  • 6 to 12 months: additional vaccines as per schedule (per CDC)

  • Note: Seasonal influenza vaccination (inactivated) yearly by age; exact schedule should align with current CDC guidance.

• Nutritional guidance (breast milk, formula, solids):

  • Breast milk is recommended exclusively for the first 6 months; continue breastfeeding with complementary foods up to 2 years or longer as desired.

  • Iron-fortified formula is an acceptable alternative to breast milk; cow's milk is not recommended in the first year.

  • Vitamin D supplementation should begin within the first few days of life for breastfed or partially breastfed infants; supplementation is also considered if formula intake is less than $28\text{ oz/day}$ (≈ $0.8\text{ L/day}$).

  • Iron supplements may be prescribed if indicated.

  • Water/juice: no need for alternative fluids during the first four months; excessive water can cause hyponatremia/water intoxication.

  • After 6 months: limit 100% fruit juice to $4\text{ to }6\,\text{oz/day}$; solids (complementary foods) introduced around ~6 months; iron-fortified cereal is commonly introduced first due to iron content; single new ingredient every 3–5 days to monitor for allergy/intolerance.

  • Breast milk or formula remains the primary nutrition through the first year; solids gradually replace bottles/formula as intake increases; table foods can be introduced by age 1 year; finger foods include bananas, toast strips, graham crackers, cheese cubes, noodles, well-cooked vegetables, and soft fruit pieces (avoid grapes).

  • Weaning: begin when infant shows readiness and is able to drink from a cup with handles; gradually replace bottle or breastfeeding with cup feeding; bedtime feeds are the last to be stopped.

  • Weaning and feeding should align with a routine and provider recommendations.

• Sleep and rest:

  • Nocturnal sleep pattern is established by around 3–4 months.

  • Total sleep: about $14\text{ to }15\text{ hours/day}$; night sleep around $9\text{ to }11\text{ hours}$ by about 4 months.

  • By 12 months: infant often sleeps through the night and takes 1–2 daytime naps.

• Injury prevention (categories and methods):

  • Aspiration: hold infant for feedings; do not prop bottles; avoid small objects that can be swallowed (e.g., grapes, coins, candy); provide age-appropriate safe toys.

  • Poisoning: keep toxins and medications out of reach; use childproof containers; keep the Poison Control number accessible.

  • Drowning: never leave infants unattended near water; secure fencing around pools; supervise near bathtubs; close bathroom doors.

  • Suffocation/Choking: use safe sleep environment; avoid small parts; keep crib free of loose items.

  • General home safety: anchor heavy furniture; remove choking hazards; keep pets supervised; ladder and stair safety gates on both top and bottom; check clothing for safety hazards; use screen sun protection; keep outlets covered; balloons kept away from infants; avoid plastic bags.

  • Burns: do not heat formula in a microwave; test liquid temperature before feeding; set water heater to ≤ $49^{\circ}\text{C}$ (120°F).

  • Fire/smoke detectors: ensure working detectors in home.

  • Car safety: infants remain rear-facing in the back seat until age 2 or until height/weight limit per manufacturer; back seat is the safest area; never place rear-facing seats in front of airbags; never leave infant unattended in a parked car.

  • Crib safety: mattress as low as possible; rails fully up; remove crib mobiles by age ~4–5 months; pillows not allowed; crib should have no loose bedding or pillows; place infant on back to sleep; avoid small parts in toys.

  • Other hazards: avoid balloons and plastic bags around infants; keep crib and play areas free of small parts.

Discharge and Follow-up Care

• Infants discharged within 48 hours of birth should have a follow-up check with a provider within 48 hours of discharge.

• Provide caregiver education on safety, immunizations, feeding, sleep, and early warning signs requiring medical attention.

ATI Active Learning Template (Educational Prompts)

• Developmental stage (infant): Piaget and Erikson perspectives

  • Piaget: Sensorimotor stage (birth–24 months). Progression through reflexive → primary circular → secondary circular → coordination of schemes and early symbol use; key tasks include separation, object permanence, and mental representation.

  • Erikson: Trust vs Mistrust (birth to 1 year). Trust is achieved when caregiver consistently meets the infant’s comfort, feeding, stimulation, and caregiving needs; inadequate or inconsistent care can lead to mistrust and potential long-term relational effects.

• Cognitive development prompts

  • List two cognitive developmental tasks the infant should accomplish in the first year (from Piaget): object permanence and mental representation (also separation as a social-censory milestone).

• Age-appropriate activities (examples by age)

  • 2–4 months: talk to the infant, read, sing; provide tummy time supervision; allow reaching for safe toys; stimulate with sensory objects.

  • 4–6 months: face-to-face interactions; mirror play; soft rattles; music and singing; tummy time with toys just out of reach.

  • 6–9 months: object permanence play (hiding and revealing toys); grasping and transferring objects; safe teething toys; responsive vocal play.

  • 9–12 months: simple games like pat-a-cat, peekaboo; encourage crawling, standing with support; introduce safe finger foods; turn-taking vocalizations.

• Injury prevention activity prompts

  • Aspiration: two methods (e.g., avoid propping bottles; ensure age-appropriate, small object-free feeding environment).

  • Poisoning: two methods (e.g., store chemicals and medications high and locked; keep Poison Control number readily accessible).

  • Drowning: two methods (e.g., never leave unattended near water; secure fences/gates around pools).

  • Suffocation: two methods (e.g., sleep on back in a safe sleep environment; avoid loose bedding and pillows in crib).

  • Other hazards: two methods (e.g., cabinet safety locks; safe handling and storage of hot liquids and cords).

Information source: Centers for Disease Control and Prevention (CDC) developmental milestones and immunization recommendations; 2022 update included.