According to thelaboroflove.comSome sleep positions are better than others while pregnant. Medical professionals recommend that women sleep on their left side in order to allow maximum blood flow to the baby. This also improves the mother’s kidney functioning which aids in reducing swelling. Also, sleeping on your left side will avoid pressure on your liver, which is located on the right side of your body.Naturally, sleeping on your tummy is not a good idea. For starters, at 8 to 9 months pregnant, you’re likely to look and feel like a crazy see-saw! Besides that comical point of view, it’s just not comfortable and it can put a lot of pressure on your baby.As for sleeping on your back, this is also not a good idea because it applies pressure to the inferior vena cava, a major vein which sends blood from your lower body to your heart. Lightheadedness and numbness can result, and anyway, sleeping on your back when pregnant is rather uncomfortable when your baby’s size is more substantial because your back and intestines will be uncomfortable under the pressure.