As soon as possible so when its not safe for u to do so, you're already use to it.
36wks here and still half sleeping on my tummy.
When it becomes uncomfortable... With my first 3 children I slept on my stomach the whole 9 months but this baby isn't going for it at all...
I'm 31 weeks and wake up on my stomach sometimes. I was wondering the same thing. .
I slept on my stomach until 27 weeks. My baby girl definitely let me know when she wasn't going to allow it anymore
When it gets uncomfortable.
Your baby is well protected in the uterus.
I am 23 weeks and still lie half on my stomach (on side with one leg bent and one straight) its starting to get uncomfy for me now.