What does your child's development mean? How your child plays, learns, speaks, acts, or moves.

What are milestones? Milestones are things that show your child's development. For example, when your child starts talking or walking. Most children learn things about the same age.

Milestones are not exact though. For example, some babies walk when they are only 9 months. Others walk when they are 15 months. This is okay. No one is the same.

But if a child is far behind in a certain stage, you can talk to the pediatrician to see if your child can use extra help. A doctor can also check for other things. For example, if a baby is not speaking or responding to your voice, a doctor can check the baby's hearing.

If you are concerned about your child's development or think your child may have a disability, it is very important to act early and get extra help as soon as possible.

The resources on this page are from the CDC. They give you suggestions about when things might typically happen for a child at a certain age. There is also advice about keeping checklists and how to get help.