Postpartum hemorrhage refers to a condition where, if the patient has vaginal delivery, the bleeding exceeds 500 milliliters within 24 hours after the fetus is delivered. If the delivery is via cesarean section, the bleeding exceeds 1000 milliliters, which is considered significant postpartum hemorrhage. The primary cause is mostly related to poor uterine contractions. Due to inadequate muscle contractions of the uterus, the blood vessels in the uterine muscle layer remain open, leading to bleeding. Another cause relates to placental factors, such as when the placenta is not entirely expelled, leading to remnants of the placenta and membranes remaining in the uterine cavity, which can also cause postpartum bleeding.