CDC checklist

9 Month Milestones

Here's what most children (75% or more) do by 9 months, according to the CDC. Tick off what you've seen and bring the list to your next checkup.

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Social and emotional

Language and communication

Learning and problem-solving

Movement and physical

If something worries you

You know your child best. If your child isn't reaching one or more milestones, has lost skills they once had, or you have other concerns, talk with your child's doctor. The CDC says not to wait. You can also contact your state's early intervention program at cdc.gov/FindEI.

Things to try at 9 months (from the CDC)

  • Repeat your baby's sounds and say simple words using those sounds. For example, if your baby says "bababa," repeat "bababa," then say "book."
  • Place toys on the ground or on a play mat a little out of reach and encourage your baby to crawl, scoot, or roll to get them. Celebrate when she reaches them.
  • Teach your baby to wave "bye-bye" or shake his head "no." For example, wave and say "bye-bye" when you are leaving. You can also teach simple baby sign language to help your baby tell you what he wants before he can use words.

Source: CDC, What most children do by 9 months (CDC Learn the Signs. Act Early. milestone checklists), retrieved 2026-10-16. These checklists don't replace developmental screening by your child's doctor. Sprout Diary is not a medical service.