Chances are that they’ll develop just fine, on their own timeline.

But if your child does have a delay, here’s what to look for.

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American Academy of Pediatrics.https://www.healthychildren.org/English/ages-stages/toddler/Pages/Language-Delay.aspxOpens a new window[Accessed January 2022]

AAP.

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Important milestones: Your baby by two months.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-2mo.htmlOpens a new window[Accessed January 2022]

CDC.

Important milestones: Your baby by four months.

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U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-4mo.htmlOpens a new window[Accessed January 2022]

CDC.

Important milestones: Your baby by six months.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-6mo.htmlOpens a new window[Accessed January 2022]

CDC.

baby being held up and stiffening arms

Important milestones: Your baby by nine months.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-9mo.htmlOpens a new window[Accessed January 2022]

CDC.

Important milestones: Your baby by one year.

illustrated chart showing both upper and lower teeth and the order of their eruption as listed by age

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-1yr.htmlOpens a new window[Accessed January 2022]

CDC.

Important milestones: Your Child by Eighteen Months.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-18mo.htmlOpens a new window[Accessed January 2022]

CDC.

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Important Milestones: Your Child By Two Years.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-2yr.htmlOpens a new window[Accessed January 2022]

CDC.

Important Milestones: Your Child By Three Years.

A baby waving

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-3yr.htmlOpens a new window[Accessed January 2022]

CDC.

Important Milestones: Your Child By Four Years.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-4yr.htmlOpens a new window[Accessed January 2022]

CDC.

phone with BabyCenter app

Important Milestones: Your Child By Five Years.

U.S. Centers for Disease Control and Prevention.https://www.cdc.gov/ncbddd/actearly/milestones/milestones-5yr.htmlOpens a new window[Accessed January 2022]

Nancy Montgomery