Milestone Checker
Select your child's age to see standard developmental milestones, based on guidance from the CDC's "Learn the Signs. Act Early." program.
Every child grows at their own pace. This checklist is an educational tool to help you track progress — it is not a medical diagnosis. If you have any concerns about your child's development, talk to your pediatrician. You never need a doctor's referral or a diagnosis to ask for a free Early Intervention evaluation.
Log in to save your child's progress.
Milestones by age
Browse the full developmental milestone checklist for each age.
Frequently asked questions
What developmental milestones should my child reach by age? +
Children typically reach milestones in social, language, cognitive, and physical skills at predictable ages. For example, most babies smile at people by 2 months, babble by 6 months, and say a few words by 12 months. Use the checker above to see CDC milestones for each age from 2 months to 3 years.
What are developmental red flags in young children? +
Talk to your doctor right away if your child loses skills they once had, doesn't respond to their name or make eye contact, isn't babbling or using gestures by 12 months, isn't saying single words by 16 months or two-word phrases by 24 months, or has trouble with feeding or muscle tone. Trust your instincts — acting early makes a real difference.
Is the milestone checker a medical diagnosis? +
No. Every child develops at their own pace, and this checker is an educational tool to help you track progress — not a diagnosis. If you have any concerns about your child's development, talk to your pediatrician.
What should I do if my child is missing milestones? +
Share your concerns with your pediatrician and consider requesting a free Early Intervention evaluation. You never need a doctor's referral or a diagnosis to ask for one — Early Intervention is a free, federally funded program in every U.S. state for children under 3.
How much does an Early Intervention evaluation cost? +
Early Intervention evaluations are free for families. The program is available in every U.S. state for children from birth to age 3, regardless of income or insurance, and you can request an evaluation yourself.