What to know
- Developmental milestones are things most children (75% or more) can do by a certain age.
- Children reach milestones in how they play, learn, speak, act, and move.

Content Source
National Center on Birth Defects and Developmental Disabilities (NCBDDD)
About This Page
Published: September 4, 2025
Updated: February 17, 2026
This page was last updated on this date. Updates may include minor edits, image changes, or other modifications to page content.
Reviewed: February 17, 2026
The information on this page was last reviewed by subject matter experts to ensure accuracy.
