DS1 didnt roll back to front till 8 months and DS2 not rolling at all yet.

But DS1 was in a grobag from 9 weeks so couldnt get tangled in blankets. They will hit head but it wont so hard that it will damage her head. Don't be tempted to use cot bumpers as they are more dangerous as they cant breath thru them if they end up against them.

DS2 is still swaddled and in bassinet.