Pregnancy can not do sit-ups. Sit-ups belong to the waist and abdomen exercise, in the process of doing will increase abdominal pressure, the abdomen caused a certain amount of extrusion, you can not do sit-ups exercise during pregnancy. In early pregnancy, the embryo and uterine wall connection is not close enough, sit-ups stretching the waist and abdomen is easy to stimulate uterine contraction, which will increase the incidence of preterm miscarriage. In the middle and late stages of pregnancy with the development of the fetus uterus increased significantly, do sit-ups will squeeze to the abdomen, pressure on the fetus, the development of the fetus caused adverse effects. At the same time, the contraction of the abdominal muscles during sit-ups will also stimulate uterine contractions, leading to miscarriage or preterm labor. You can not do sit-ups during pregnancy, pregnant women can choose gentle exercise, such as walking, pregnancy yoga or swimming, etc., to avoid strenuous exercise and increase abdominal pressure exercise.