My understanding is after 20 weeks avoid sleeping on your back all night. This prevents your uterus from putting pressure on your major blood vessels. It's best to lie on your left side for optimal blood circulation but the right side is okay as well. It's no big deal if you wake up and find you're on your back just roll back to your side.
"It's always better when we're together."
-Jack Johnson
Re: Is this true? laying on your back....
A15 January Siggy Challenge-