I didn't know this. My bossy freind told me off for doing it, said i am reducing Oxygen supply to my baby
This is 3rd pregnancy and she was shocked that I didn't know. Made me feel really bad too.
If I sleep on side baby gets squashed and wriggles in protest (it seems but might not be,might be my imagination)
And now cant sleep on my back its a nigthmare in the heat isnt it. I will try sleeping standing up tonight
Mind you, i do get breathless if I sleep on my back now. Hope i havnt caused any damage. other two seem ok.