Developmental Milestones 1-3 Months

Study Notes

Developmental Milestones: Infancy to Early Childhood

1-3 months: Focus on mobile toys to stimulate lying babies' vision.
1 month: Head lag present, limited to 10 inches vision, cries from discomfort/hunger, produces throaty sounds, and demonstrates a fisted hand.
2 months: Improved head control, can lift head/chest with support, coos, opens hands, briefly handles a rattle, and shows an early social smile.
3 months: Can lift head and chest with one-arm support, follows objects with eyes, laughs/giggles, engages in hand-to-mouth coordination, and thumb sucking begins.
4 months: Rolls from prone to supine, reaches for objects, babbles, and reflexes like Darwin, Moro, Tonic neck, and rooting begin to disappear.
5 months: No head lag, rolls over, begins showing anger when objects are taken, and increases babbling frequency.
6 months: Weight doubles, starts complementary feeding, first teeth emerge, sits with support, imitates vowel sounds, and exhibits stranger anxiety.
7 months: Transfers objects hand to hand, throws rattles, and can say the first word.
8 months: Sits without support and begins crawling, peak of stranger anxiety, and teeth emergence (upper central incisors).
9 months: Engages in creeping and crawling, stranger anxiety begins decreasing, develops a weak pincer grasp, and waves bye-bye.
10 months: Stands with assistance, well-refined pincer grasp, develops object permanence, enjoys peek-a-boo and patty cake games.
11 months: Uses a spoon, drinks from a cup, and practices cruising while holding onto surfaces for support.
12 months: Triples body weight, eats most table foods, uses simple words like "dada" and "mama," stands alone, and walks with assistance.
15 months: Walks independently, walks backward, and begins crawling up stairs.
18 months: Transitions from infant to toddler, displays autonomy and self-control, peaks in separation anxiety, engages in temper tantrums, and starts toilet training.
24 months: Runs well, climbs furniture, opens doorknobs (increased risk for accidents), can draw a vertical line, stacks up to six blocks, and weighs four times the birth weight.
36 months: Transitions to preschooler, shows destructiveness, interacts cooperatively, has imaginary friends, uses over 300 words, fondles genitals, and rides a tricycle.
4 years: Vocabulary exceeds 1,500 words, uses scissors, draws a 4-part man, and recognizes shapes.
5 years: Vocabulary >2,000 words, ties shoelaces, draws a triangle, and can print full name, rides a bicycle.
6 years: Vocabulary >3,000 words, displays competitiveness, recalls past/present events, understands the concept of death, participates in field and playground games, and sees disappearance of Mongolian spots.

Developmental Play and Emotional Growth

Infant Play: Solitary play, builds hope and attachment to the mother or primary caregiver; fears include strangers and accidents like falls or choking.
Toddler Play: Engages in parallel play, and fosters imagination, autonomy, and self-expression.