The susceptibility of postpartum hemorrhage includes the following: 1, the presence of pregnancy complications: such as the combination of placenta praevia, placental abruption, uterine infection, hypertensive disorders in pregnancy, etc.; 2, excessive amniotic fluid or huge fetus in multiple pregnancies; 3, scarred uterus; 4, too many births: too many births have a certain degree of damage to the uterine muscle fibers, affecting the uterine contraction force, which can lead to postpartum bleeding; 5, the presence of coagulation disorders: such as severe thrombocytopenia, abnormalities of the coagulation factors, which can lead to postpartum hemorrhage in a large number of cases.