According to the American Academy of Pediatrics, the first three years of your child’s life are very special – they are full of rapid transition and growth. How your child plays, learns, speaks, and acts provides important clues about your child’s development.


Developmental Milestones

Below are lists of developmental milestones – things that most children can do at these ages – as well as signs of possible developmental delays at this age according to the Centers for Disease Control and Prevention.

2 months

4 months

6 months

9 months

1 year

18 months

2 years

3 years

To download the full checklist of developmental milestone from ages 2 months to 5 years old and delays to look out for, click here (English & Español).

To download the “How’s Baby” developmental checklist for children ages 0 to 3, click here


What if I notice a delay?

If you are concerned about any developmental delays your child may be experiencing, ask your child’s doctor or nurse, or talk with someone in your community who is familiar with services for infants and toddlers in your area.

Your Child’s Health > (link to Health & Fitness)

Parenting Programs > (link to Parenting Programs)

Family Resources and Service Providers > (link to Family Resources)


How important are regular screenings?

The checklists you find here are not a substitute for standardized, validated developmental screening tools such as those that might be administered by your child’s doctor.

The American Academy of Pediatrics recommends that children be screened for general development using standardized, validated tools at 9, 18, and 24 or 30 months and for autism at 18 and 24 months or whenever a parent or provider has a concern. Ask your child’s doctor about his or her developmental screening.