Premature rupture of membranes mostly occurs when the uterus is fully opened under normal conditions. If the rupture of fetal membranes occurs before delivery, the membranes are prematurely ruptured. The effects of premature rupture of membranes on pregnant women are as follows: 1) chorioamnionitis: symptoms include fever, increased pulse rate, uterine pressure, and if the amniotic fluid has a foul odor, it indicates that the infection is serious; 2) increased rate of obstructed labor: abnormal fetal position can lead to premature rupture of membranes, and the mother needs to pay attention to the presence of pelvic stenosis, cephalopelvic disproportion and abnormal fetal head position. The above factors can increase the rate of obstructed labor; 3, postpartum hemorrhage: intrauterine infection can affect uterine contraction and increase bleeding; 4, amniotic fluid embolism: after premature rupture of membranes, if the use of oxytocin is inappropriate, it can induce amniotic fluid embolism; 5, placental abruption: it can lead to fetal death, maternal hemorrhage, coagulation dysfunction, etc.