CDC’s Developmental Milestones

CDC’s milestones and parent tips have been updated and new checklist ages have been added (15 and 30 months). For more information about the updates to CDC’s developmental milestones, please review the Pediatrics journal article and these important key points.

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.
• Developmental Milestone Checklists for WIC
• 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.

Special acknowledgments to the subject matter experts and others who contributed to the review of data and selection of developmental milestones, especially Paul H. Lipkin, MD, Michelle M. Macias, MD, Julie F. Pajek, PhD, Judith S. Shaw, EdD, MPH, RN, Karnesha Slaughter, MPH, Jane K. Squires, PhD, Toni M. Whitaker, MD, Lisa D. Wiggins, PhD, and Jennifer M. Zubler, MD.
Sincere gratitude to Natalia Benza, MD and José O. Rodríguez, MD, MBA for their thoughtful review of the Spanish-language translation of these milestones.