I was never told this but now it makes sense as to why I was always so uncomfortable on my back...I always thought I was the weight of the baby on everything. Good to know for next time!
Yes, it's not good for baby! They say sleeping on the left side is the best side. It increases the amount of blood flow and nutrients that reach your placenta. @trulyslim
When you lie belly-up, the weight of your uterus can compress a major blood vessel, called the vena cava, disrupting blood flow to your baby and leaving you nauseated, dizzy, and short of breath.