when to stop laying on your back during pregnancy
You should stop sleeping on your stomach or back by around 20 weeks of pregnancy. By this point, you may notice that sleeping either way â especially on your stomach â is pretty uncomfortable. The concern with sleeping on your back is that the enlarging uterus can compress the large veins in the back of your abdomen, which can in turn decrease the amount of blood returning to your heart. As a result, your blood pressure can drop, and you may feel lightheaded or nauseated.