Pregnancy is not recommended to sleep on the stomach. Occasionally sleeping on your back for a while does not have much effect, but if you sleep on your back for a long time, it may cause adverse effects, leading to increased uterine tension, causing uterine contractions to break the water, and even leading to preterm labor, premature abruption of the placenta, and so on. Pregnant women should sleep in the side position, you can sleep on the left side of the position and the right side of the position alternately. Pregnant women should pay attention to the sleeping position should be correct, the limbs should not be compressed, the abdomen should not be compressed, to pay attention to the protection of the fetus, can not blindly take drugs. Pregnant women should maintain a pleasant mood and do regular checkups during pregnancy. Pregnant women who sleep on their stomachs produce stomach pain, increased secretions, vaginal bleeding and other conditions should go to the Obstetrics and Gynecology Department in time, do not delay the condition.