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 (crawling, walking, etc.).
Click on the age of your child to see the milestones:
- 2 months
- 4 months
- 6 months
- 9 months
- 1 year
- 18 months
- 2 years
- 3 years
- 4 years
- 5 years
- Print the milestone checklists (PDF) pdf icon[2 MB, 20 Pages, 508]
- Download the Milestone Tracker mobile app
- View the Milestones in Action photo and video library
“Learn the Signs. Act Early.” materials are not a substitute for standardized, validated developmental screening tools pdf icon[918 KB, 115 Pages, Print Only].
In this video, parents of young children share their personal experiences of using CDC’s “Learn the Signs. Act Early.” tools and resources to learn about child development, recognize the milestones their child should be reaching, and guide them about what to do if they ever become concerned.
In this Spanish-language video, two families share personal stories of how using CDC’s “Learn the Signs. Act Early.” resources helps them learn about their child’s developmental milestones and support their children’s development.