CDC’s Developmental Milestones

Skills such as taking a first step, smiling for the first time, and waving “bye bye” are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move.

Click on the age of your child to see the milestones:

2 months
4 months
6 months
9 months
1 year
15 months
18 months
2 years
30 months
3 years
4 years
5 years
Milestone checklists translated into other languages
Print the milestone checklists (PDF) [4 MB, 24 Pages, 508] or click on your child’s age above to complete the checklist online.
Download the Milestone Tracker mobile app
Complete a checklist using the Digital Online Checklist

“Learn the Signs. Act Early.” materials are not a substitute for standardized, validated developmental screening tools.

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