Rolls tummy to back
Typical Timing & Development Window
Visual Timeline & Milestone Benchmarks
What these numbers mean
The average age babies first begin showing early signs of this skill. Before this, it's simply too early — there's nothing to worry about.
The midpoint age: half of babies have reached this milestone by here, half a little later. It's a typical target, not a deadline.
How spread out the timing is. About two-thirds of babies achieve it within one standard deviation of the median (the shaded band, wk 20–28). Wide bands mean a normal range of variation.
A gentle check-in point. If your baby hasn't shown this by around here, it can be worth mentioning to your pediatrician — most often it's still perfectly fine, just later.
About this milestone
The infant successfully shifts their body weight to roll over from their stomach onto their back. This milestone requires coordinated trunk rotation, lateral head righting, and neck extensor strength, representing the infant's first self-initiated, multi-planar locomotor movement.
- 1. Offer short, supervised tummy time sessions with engaging toys placed just within reach to encourage trunk rotation.
- 2. Assist the roll by gently guiding one of the infant's hips over the other when they begin to tilt their body.
- 3. Provide ample open floor play space free of surrounding hazards, encouraging spontaneous rolling attempts.
- 1. Avoid leaving the infant unsupervised during rolling practice.
- 2. Avoid starting tummy time immediately after a feeding session to minimize reflux and digestive discomfort.
- 3. Avoid swaddling the infant once they show early signs of trying to roll, as this poses a suffocation risk.