CDC Developmental Milestone Checklists

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These checklists are part of the CDC's "Learn the Signs. Act Early." program, a major initiative to educate families on what to expect from their children at each stage of development.The new materials diverge substantially from the ones that have been in place since the CDC first launched the checklists in 2004.

The update includes additional checklists at ages 15 and 30 months so that there is one available to align with every recommended well-child visit between ages 2 months and 5 years. The materials also feature expanded tips and activities so that caregivers can support development at each stage and there are red flags and warning signs embedded within the milestones.