Rolls over (front to back and back to front)

What is this milestone?

First major movement milestone

Rolling over involves using their core, arm, and neck strength to flip their body from their stomach to their back, or from their back to their stomach.

Why it matters

Rolling is their first real taste of independent locomotion. It requires significant coordination of the upper and lower body and builds the trunk strength necessary for sitting upright.

What to expect leading up to it

Most babies master rolling from tummy to back first, often doing it accidentally at the start. Before a full roll, you'll see lots of vigorous kicking, arching the back, and rocking side to side.

How to encourage and support it

Provide plenty of safe, supervised floor time. When they are on their back, dangle a favorite toy to the side to encourage them to reach and twist their body. Celebrate enthusiastically when they make their first successful flips! One important change comes with rolling: stop swaddling as soon as your baby shows any sign of rolling, even before they can do it all the way. A swaddled baby who rolls onto their stomach cannot push up or free their arms. Move to a sleep sack with the arms out. Keep putting your baby down on their back to sleep — once they can roll both ways on their own, it is fine to let them find their own position.

When to talk to your doctor

The CDC's milestone checklists say what most children (75% or more) can do by each age. They list “Rolls from tummy to back” by 6 months; they do not list rolling from back to tummy. If your child is not doing this by then, the CDC's advice is not to wait: talk with your child's doctor, share your concerns, and ask about developmental screening. The same goes at any age if your child loses a skill they once had, or if anything else about their development worries you. Source: the CDC's “Learn the Signs. Act Early.” milestone checklists, checked October 5, 2026.

CDC: Milestones by 6 months · CDC: all milestone checklists