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.
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Developmental milestones
Sleep schedule
Feeding guide
Growth expectations
Month checklist
When to call the doctor
Phase 2
Infant (4–12 months)
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.
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