Pregnant women empty the bladder, loosen the belt, knee-chest position, the chest should be as close as possible to the bed, the thighs should be perpendicular to the bed, the hips should be raised as much as possible, twice a day, 15 minutes each time, and go to the hospital after 1 week double check. This posture can cause the buttocks of the fetus to withdraw from the pelvic cavity, and with the change of the center of gravity of the fetus, the fetal head can enter the pelvic cavity.