Baby Milestones Month by Month: What to Expect in the First Year
Track your baby's development with our comprehensive month-by-month milestone guide, from first smile to first steps.
Sophie Lane
Baby development writer
Watching your baby grow and develop new skills is one of the most magical parts of the first year. From that first social smile to those wobbly first steps, each milestone is worth celebrating.
This guide covers what to expect month by month — but remember, babies develop at their own pace. The ranges we give are averages, not deadlines.
A Note About Milestones
Months 1-3: The Fourth Trimester
The first three months are sometimes called the "fourth trimester" — your baby is adjusting to life outside the womb and developing rapidly.
Month 1
| Area | Milestones |
|---|---|
| Physical | Lifts head briefly during tummy time, jerky arm movements |
| Cognitive | Focuses on faces 8-12 inches away, startles at loud sounds |
| Social | Calms when picked up, begins to recognize parents' voices |
Month 2
| Area | Milestones |
|---|---|
| Physical | Holds head up at 45° during tummy time, smoother movements |
| Cognitive | Tracks objects with eyes, may turn toward sounds |
| Social | First social smile (!), starts cooing |
Month 3
| Area | Milestones |
|---|---|
| Physical | Holds head steady, pushes up on arms during tummy time |
| Cognitive | Recognizes familiar faces, watches faces intently |
| Social | Smiles at people, enjoys playing with others, imitates some movements |
Months 4-6: Becoming Social
This is when things get really fun. Your baby becomes more interactive, more expressive, and starts showing their personality.
Month 4
| Area | Milestones |
|---|---|
| Physical | Rolls from tummy to back, brings hands to mouth, grasps toys |
| Cognitive | Reaches for toys, mouths everything, likes to play |
| Social | Laughs out loud, shows excitement, may show preference for certain toys |
Month 5
| Area | Milestones |
|---|---|
| Physical | Rolls both directions, sits with support, stands on legs when held |
| Cognitive | Explores objects with hands and mouth, curious about everything |
| Social | Recognizes name, starts understanding cause and effect |
Month 6
| Area | Milestones |
|---|---|
| Physical | Sits without support briefly, starts rocking on hands and knees |
| Cognitive | Passes objects hand to hand, looks for dropped toys |
| Social | Responds to emotions, may show stranger anxiety, babbles consonants |
Ready for Solids?
Months 7-9: On the Move
Get ready to baby-proof! This is when many babies start becoming mobile — and getting into everything.
Month 7
| Area | Milestones |
|---|---|
| Physical | Sits independently, may start army crawling or scooting |
| Cognitive | Finds partially hidden objects, explores with hands and mouth |
| Social | Enjoys games like peek-a-boo, responds to name consistently |
Month 8
| Area | Milestones |
|---|---|
| Physical | Crawls on hands and knees, pulls to standing, claps hands |
| Cognitive | Understands object permanence, looks for hidden objects |
| Social | Stranger anxiety peaks, strong attachment to caregivers |
Month 9
| Area | Milestones |
|---|---|
| Physical | Cruises along furniture, uses pincer grasp, points |
| Cognitive | Drops objects on purpose, imitates gestures |
| Social | Clings to familiar adults, may have favorite toys, waves bye-bye |
Months 10-12: Almost a Toddler
The final stretch! Your baby is becoming more independent, communicative, and possibly taking those exciting first steps.
Month 10
| Area | Milestones |
|---|---|
| Physical | Stands alone momentarily, walks holding onto furniture confidently |
| Cognitive | Puts objects in containers, bangs two objects together |
| Social | Responds to simple verbal requests, plays simple games |
Month 11
| Area | Milestones |
|---|---|
| Physical | May take first independent steps, climbs stairs with help |
| Cognitive | Uses objects correctly (phone to ear, brush on hair) |
| Social | Says 1-2 words besides mama/dada, follows simple instructions |
Month 12 — Happy Birthday!
| Area | Milestones |
|---|---|
| Physical | May be walking, or close to it, drinks from cup with help |
| Cognitive | Points to show interest, tries to imitate words |
| Social | Shows preferences for people and toys, helps with dressing |
Walking Timeline
When to Talk to Your Pediatrician
While there's a wide range of normal, some signs warrant a conversation with your pediatrician:
- Not making eye contact by 3 months
- No social smile by 4 months
- Not reaching for objects by 5 months
- Not babbling by 7 months
- Not sitting with support by 9 months
- Not responding to name by 12 months
- Losing skills they previously had
- Not bearing weight on legs by 12 months
Early intervention is incredibly effective. If you have any concerns, it's always worth asking. Trust your instincts — you know your baby best.
Free Printable Milestone Tracker
Want to capture all these precious moments? Our milestone tracker helps you:
- Track physical, cognitive, and social milestones month by month
- Record the exact date each milestone happened
- Note funny moments and first experiences
- Create a keepsake for baby's memory book
- Have organized info ready for pediatrician visits
Milestone Tracker Printable
Never forget when baby first smiled, rolled over, or said 'mama'. Our beautiful tracker makes it easy.
Every milestone, big or small, is worth celebrating. Your baby is growing into an amazing little person — and you're doing a wonderful job helping them get there.
