My 4 month old has just started successfully rolling from back to tummy (she cant go tummy to back yet) and now does it all the time when i put her down for sleep in bedside sleeper bassinet (night time) and cot (daytime). I put her down asleep on her back but she always rolls over to her side, sometimes will stay there all night, other times she rolls straight over to tummy and sleeps face down. I try to turn her head but she just puts it back, if i roll her back then she is awake and self settles, but rolls over again. If i can see her nose and mouth clear of the mattress/fitted sheet, do i need to worry? Im waking up at least 10 times a night checking on her. Thanks.

Most babies will be rolling over by 4- 5 months…...some earlier, some later.                              This is normal as babies grow & become stronger.
Many babies then prefer to sleep on their tummy & some seem to face plant on occasions.
This is not something that needs to be stopped. It is important to make her environment as safe as possible.

**Firstly, now that your baby is rolling, she needs to be in her cot for all sleeps & not wrapped or swaddled.
Baby needs arms free & space of the cot to roll safely.
Increase tummy time when awake to help build upper body strength.

Ensure that the cot mattress is firm & flat & there is nothing soft or loose in her cot, especially as she is face planting at times.
Important to make her sleep environment as safe as is possible.
**Always continue to place baby on back to sleep.

Red Nose has the following general information now that she is rolling.

Give baby extra tummy time to play when awake and supervised as this helps baby to develop stronger neck and upper body muscles which in turn enables them to roll back over.
Make sure that baby is on a firm and well-fitting mattress that is flat (not tilted or elevated).
Make sure that baby’s face and head remains uncovered (do not use lambswool, doonas, pillows, cot bumpers or soft toys)

As babies grow and develop they become very active and learn to roll around the cot.
At this time, continue to put them on the back at the start of sleep time, but let them find their own position of comfort.
By this stage it is not necessary to wake during the night to turn baby over to the back position

Do not use any devices designed to keep baby in a particular sleep position.
https://rednose.org.au/article/what-do-we-do-now-that-a-baby-has-started-to-roll-over