Hi - Our 14 week old baby has started rolling over onto her side in the cot to sleep. We place her on her back to begin with (she sleeps in a sleeping bag no blankets) but she ends up on her side & seems to like this. She hasn’t yet been able to roll over completely. Does this make side sleeping unsafe? Should I wake to roll her onto her back? That’s hard to monitor over night. Any other tips? Thank you!

Is the sleeping bag your baby sleeps in one where her arms are out?

Red Nose recommends that all babies should have “arms free”  from wrap/swaddle around 3 months of age in preparation for rolling.

Modify the wrap to meet the baby’s developmental changes, e.g. arms free once ‘startle’ reflex begins to disappear which is usually around 3 months;
(Moro or ‘startle’ reflex should have disappeared completely by 4-5 months).

It would be quite possible that your baby will soon be rolling on to her during sleep time. The following is general information.

Continue to place baby on their back to sleep.
Cease wrapping (baby needs arms out) & transfer to cot (if still in a bassinet)

Ensure cot mattress is firm, well-fitting & flat.
Ensure there is nothing loose or soft in the cot.
Preferable to use a sleeping bag now that has appropriate size neck & arm holes.

Red Nose has the following information now that your baby girl is starting to roll.

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.com.au/article/what-do-we-do-now-that-a-baby-has-started-to-roll-over