Sunday, April 2, is World Autism Day. Autism Spectrum Disorder (ASD) is a development disability that can cause significant social, communication and behavioral challenges.
Review this list of developmental milestones for children for general information. If you have questions, consult your child’s pediatrician to address your concerns.
For more health resources from the government, visit us at USA.gov.
See Milestones In Action
Milestones in Action is a FREE library of photos and videos of children showing 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
- Download the milestone checklists
- 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.
Learn how to look for developmental milestones and what to do if you’re worried about your child’s development or think there’s a problem.
Learn why it is important to recognize developmental milestones and what to do if you have concerns about your child's development.