Reliable Gynecologist in Baner | Sus | Pashan | Part 5 first time mom and questions there in mind ! 5. Do I really need to sleep on my left side? Can I sleep on my belly? A lot of women read online that they should sleep on their left side throughout their entire pregnancy, but that’s difficult and not necessary. You can sleep on either side, right or left. You just want to avoid sleeping on your back later in pregnancy. As your belly grows, sleeping on your back puts more pressure on the blood vessels that supply blood to your uterus. If you find yourself sleeping on your back in your second or third trimester, don’t panic. Just turn to one side or the other side . Dr Swatee Gaggare MBBS MS OBGY DNB DRM(Germany)