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BabyBloom · 0 to 36 Months

Baby Development Guide: Newborn to 3 Years

Find your baby's exact age below. Every page covers this month's developmental milestones, sleep schedule, feeding guide, and what to expect in the weeks ahead.

Free to read · No account required · Evidence-based

Developmental milestones
Sleep schedule
Feeding guide
Growth expectations
Month checklist
When to call the doctor
Phase 1
Newborn (0–3 months)
Newborn
0–4 weeks
1 Month
4–8 weeks
2 Months
First social smiles
3 Months
End of 4th trimester
Phase 2
Infant (4–12 months)
4 Months
Sleep regression
5 Months
Sitting with support
6 Months
Starting solids
7 Months
Sitting unsupported
8 Months
Crawling begins
9 Months
Pincer grasp
10 Months
Pulling to stand
11 Months
Cruising furniture
12 Months
First birthday
Phase 3
Early Toddler (13–24 months)
13–15 Months
First steps
16–18 Months
Vocabulary grows
19–21 Months
Two-word phrases
22–24 Months
Second birthday
Phase 4
Later Toddler (25–36 months)
25–30 Months
Sentences + play
31–36 Months
Third birthday

Not sure which page applies?

Development is a range, not a deadline. If your baby is between ages, read both pages. If you have concerns about delays, the milestones hub has the full 0–36 month chart.

Milestones Chart 0–36 Months → Month-by-Month Guide

Related Guides

Newborn Guide Baby Sleep Feeding Guide Milestones Postpartum All Articles

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