Learn the Signs. Act Early.

Developmental milestones can tell you a lot about your child’s development. Learn how to track them, talk about them, and support them below.

Complete a Milestone Checklist

Developmental milestones are things most children (75% or more) can do by a specific age.

How your child plays, learns, speaks, acts, and moves offers important clues about their development.

Track their development using milestone checklists, available in 3 formats:

CDC's free Milestone Tracker app, for iOS and Android devices
Web-based Digital Online Checklists
Printable checklists

Share Any Concerns

You know your child best. If you have any concerns, share them.

If your child is missing one or more milestones for their age, or if you think there could be a problem with the way your child plays, learns, speaks, acts, or moves, talk with your child’s doctor and share your concerns.

Don’t wait. Acting early can make a real difference! Visit the Learn the Signs. Act Early. Families page to learn how to act early and support your child’s needs.

Try Developmental Tips and Activities

You can support your child’s development with simple, everyday tips and activities.

To keep your child’s milestones within reach, download CDC’s FREE Milestone Tracker app from the App Store or GooglePlay.

Tap the milestone you’d like to explore below

Infant (0-1 Years)

Learn about the developmental milestones that most babies do from 2 months to 1 year of age.

See important information to share with your doctor.

Find tips and activities you can do from 2 months to 1 year of age.

Toddler (1-2 Years)

Learn about the developmental milestones that most babies do from 1 year to 2 years of age.

See important information to share with your doctor.

Find tips and activities you can do from 1 year to 2 years of age.

Toddler (2-3 Years)

Learn about the developmental milestones that most children do from 2 year to 3 years of age.

See important information to share with your doctor.

Find tips and activities you can do from 2 year to 3 years of age.

Preschoolers (3-5 Years)

Learn about the developmental milestones that most children do from 3 year to 5 years of age.

See important information to share with your doctor.

Find tips and activities you can do from 3 year to 5 years of age.

2 Months

4 Months

6 Months

9 Months

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