You should place your baby on his or her back at the start of sleep time. If you find your baby has rolled over on to his or her tummy or side, place them on their back again.
Eventually, babies learn to roll on to their front and back again. When this happens, you do not need to reposition them.
Babies who have spent time in special care may have become used to being positioned on their front and it can take some time for them to learn to settle and sleep on their back. Most babies will be introduced to back sleeping two weeks before discharge by the team caring for them on the unit.
It is recommended that babies who are reluctant to sleep on their back are not fed or cuddled to sleep before being placed in their cot.
For more information on safe sleeping, including a video, see the information provided by the Lullaby Trust