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, behave, 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
“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.
- Centers for Disease Control and Prevention
National Center on Birth Defects and Developmental Disabilities
Division of Birth Defects and Developmental Disabilities
1600 Clifton Road
Atlanta, GA 30333
TTY: (888) 232-6348
- Contact CDC-INFO