Editing Pediatric Nursing (section)

== Developmental milestones by age ==

Milestones are the single highest-yield pediatric topic. The following are the classic teaching benchmarks. Note that the United States Centers for Disease Control and Prevention revised its public milestone checklists in 2022 to reflect the age by which about 75 percent of children achieve a skill, which shifted a few published ages later than the traditional 50th-percentile figures (Zubler et al., 2022). Licensure examinations continue to test the traditional benchmarks below.

=== Infant (birth to 12 months) ===

* '''1 month:''' lifts head briefly when prone; fists mostly clenched; responds to sound.
* '''2 months:''' '''social smile'''; follows objects past midline; coos.
* '''3 months:''' holds head steady; hands open more of the time.
* '''4 months:''' '''rolls front to back'''; brings hands to midline; laughs; head lag disappears when pulled to sit.
* '''5 to 6 months:''' rolls both directions; sits with support progressing to tripod sitting; '''transfers objects hand to hand'''; begins babbling; '''stranger anxiety begins'''; birth weight doubles.
* '''7 to 8 months:''' sits unsupported; bears weight on legs; raking grasp.
* '''9 months:''' crawls; pulls to stand; '''crude pincer grasp'''; understands "no"; '''object permanence''' is established.
* '''10 to 11 months:''' cruises along furniture; neat pincer grasp; waves bye-bye.
* '''12 months:''' walks with one hand held or takes first independent steps; says 1 to 3 meaningful words plus "mama" and "dada"; triples birth weight; can drink from a cup.

=== Toddler (1 to 3 years) ===

* '''15 months:''' walks independently; builds a 2-cube tower; uses a spoon with spilling; 4 to 6 words.
* '''18 months:''' runs stiffly; climbs stairs with help; builds a 3- to 4-cube tower; 10 to 20 words; points to body parts; '''temper tantrums and negativism''' emerge.
* '''24 months:''' walks up and down stairs one step at a time; kicks a ball; builds a 6- to 7-cube tower; '''two-word phrases'''; roughly 300 words; speech about 50 percent intelligible to strangers; turns pages one at a time; begins '''parallel play'''.
* '''30 months:''' jumps with both feet; builds an 8-cube tower; copies a vertical line; knows first and last name; daytime toilet training often achieved.
* '''36 months:''' '''rides a tricycle'''; '''copies a circle'''; builds a 9- to 10-cube tower; 3-word sentences; speech about 75 percent intelligible.

=== Preschooler (3 to 6 years) ===

* '''4 years:''' '''hops on one foot'''; throws overhand; '''copies a cross and a square'''; draws a person with 3 parts; uses 4- to 5-word sentences; speech fully intelligible; engages in '''associative play''' and magical thinking.
* '''5 years:''' '''skips'''; '''copies a triangle'''; ties shoelaces; prints some letters and own name; draws a person with 6 parts; counts to 10; names 4 colors.

=== School-age (6 to 12 years) ===

* Fine motor control refines enough for cursive writing and musical instruments.
* Concrete logical thinking develops; the child can classify, sequence, and understand cause and effect.
* Peer groups and same-sex friendships dominate; rules and fairness matter intensely.
* '''Cooperative play''' with organized games and teams.
* Loss of primary teeth begins around age 6.

=== Adolescent (12 to 18 years) ===

* Puberty typically begins at '''8 to 13 years in girls''' (first sign: '''thelarche''', breast budding) and '''9 to 14 years in boys''' (first sign: '''testicular enlargement''').
* '''Menarche''' occurs on average about 2 to 2.5 years after thelarche, near the peak of the growth spurt.
* Abstract reasoning develops, but risk assessment lags behind, which explains the high rate of injury deaths in this group.
* Identity formation, peer conformity, and the personal fable ("it will not happen to me") shape health behavior.

=== Theoretical frameworks ===

{| class="wikitable"
! Age band !! Erikson (psychosocial) !! Piaget (cognitive) !! Predominant play
|-
| Infant || Trust vs. mistrust || Sensorimotor || Solitary
|-
| Toddler || Autonomy vs. shame and doubt || Sensorimotor into preoperational || Parallel
|-
| Preschooler || Initiative vs. guilt || Preoperational || Associative
|-
| School-age || Industry vs. inferiority || Concrete operational || Cooperative
|-
| Adolescent || Identity vs. role confusion || Formal operational || Peer group activity
|}

'''Application note.''' Nursing interventions map directly onto these stages. For a hospitalized toddler, support '''autonomy''' by offering limited choices ("apple juice or water?") and maintaining home rituals. For a preschooler, address '''magical thinking''' and the belief that illness is punishment; correct the fantasy that a procedure is a consequence of misbehavior. For a school-age child, support '''industry''' by allowing participation in care and keeping up with schoolwork. For an adolescent, protect '''privacy and body image''' and allow peer contact.