Development
Developmental Milestones: What to Expect in the First Year
Track your baby's development with this month-by-month guide to physical, cognitive, and social milestones in the first year.
D
•August 4th, 2025•Updated January 12th, 2026•Dr. Pandey, Developmental Pediatrician
Verified Pediatrician
3 min read
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development
first year
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Developmental Milestones: What to Expect in the First Year
Every baby develops at their own pace, but understanding typical milestones can help you track your baby's progress and know when to celebrate or when to consult your pediatrician.
0-3 Months
Physical Development
- Lifts head briefly when on tummy
- Opens and closes hands
- Brings hands to mouth
- Kicks legs when on back
Cognitive Development
- Follows objects with eyes
- Recognizes familiar faces
- Responds to sounds
- Shows interest in faces
Social Development
- Makes eye contact
- Smiles responsively
- Coos and makes sounds
- Recognizes primary caregivers
4-6 Months
Physical Development
- Rolls over (tummy to back, then back to tummy)
- Sits with support
- Reaches for objects
- Brings objects to mouth
Cognitive Development
- Shows curiosity about surroundings
- Responds to own name
- Explores objects with hands and mouth
- Shows interest in mirrors
Social Development
- Laughs and squeals
- Enjoys social play
- Shows preference for familiar people
- May show stranger anxiety
7-9 Months
Physical Development
- Sits without support
- Crawls or scoots
- Pulls to stand
- Uses pincer grasp (thumb and forefinger)
Cognitive Development
- Understands object permanence
- Imitates actions
- Explores cause and effect
- Shows problem-solving skills
Social Development
- Plays peek-a-boo
- Responds to emotions of others
- Shows attachment to primary caregivers
- May experience separation anxiety
10-12 Months
Physical Development
- Stands alone
- Takes first steps (or close to it)
- Climbs stairs with help
- Uses utensils with help
Cognitive Development
- Follows simple instructions
- Points to objects
- Says first words
- Understands "no"
Social Development
- Waves bye-bye
- Plays simple games
- Shows affection
- May show preference for certain people
When to Consult Your Pediatrician
While every baby develops at their own pace, consult your pediatrician if your baby:
- Doesn't respond to sounds by 3 months
- Doesn't smile by 3 months
- Can't hold head up by 4 months
- Doesn't roll over by 6 months
- Doesn't sit without support by 9 months
- Doesn't crawl or show mobility by 12 months
Remember, these are guidelines, not strict rules. Your baby is unique and will reach milestones in their own time.