Developmental Milestones Checklists for Infants and Young Children [downloadable]

Developmental milestones are behaviors and skills that most children demonstrate at a given age. It’s important to note that all children develop differently. Milestone checklists provide examples of typical development progress at that age.
In February 2022, the Centers for Disease Control and Prevention (CDC) and the American Academy of Pediatrics (AAP) revised the developmental milestones. An individual children may develop more rapidly in some areas than in others, and the time frame in which a normally developing child reaches a certain milestone can vary quite a bit. The new milestones identify behaviors that 75% or more children can be expected to exhibit at a certain age.

Click on the age of your child to see the milestones from Learn the Signs. Act Early, an initiative of the Centers for Disease Control and Prevention:

• 2 months
• 4 months
• 6 months
• 9 months
• 1 year
• 15 months
• 18 months
• 2 years
• 30 months
• 3 years
• 4 years
• 5 years

Download the entire set of Milestone Checklists in English and Spanish.
Remember, the checklists provide general guidelines; they are not a substitute for a developmental screening.

You can also download the Milestone Tracker mobile app for iOS and Android devices (Spanish language version will be available in fall 2018) and view the Milestones in Action photo and video library.

Source: Centers for Disease Control and Prevention |Developmental Milestones, https://www.cdc.gov/ncbddd/actearly/milestones/index.html | Last reviewed May 2024.

If you have concerns about your child’s development, schedule a evaluation or to get advice about your child’s challenges by calling or emailing a CHC Care Coordinator at 650.688.3625 or careteam@chconline.org