Rupture of the amniotic fluid, i.e. premature rupture of the membranes, usually occurs without warning. Premature rupture of membranes refers to the vaginal discharge of fluid during pregnancy. When the patient is too active, or when there is a sudden change in body position, the amount of fluid discharged will increase significantly, and then gradually decrease, and there is no way to control its outflow. Rupture of the membranes is usually sudden, and will not be perceived in advance. After premature rupture of membranes, pregnant women should stop walking immediately and avoid movements that increase abdominal pressure to prevent prolapse of the umbilical cord. Redness and contractions may occur, and it is necessary to go to the obstetrics department of the hospital as soon as possible to be hospitalized for delivery, and it is also necessary to do fetal heart monitoring specifically to see if the fetus is suffering from lack of oxygen in the uterine cavity. After premature rupture of membranes occurs, the umbilical cord is prone to prolapse or bacterial infection in the vagina that leads to infection in the uterine cavity, so it is necessary to be hospitalized in time.