PPH occurs in approximately 1-5% of deliveries in the United States and accounts for 20-25% of maternal deaths worldwide. PPH is difficult to predict, but classically, risk factors for PPH- uterine atony, abruption, retained tissue, lacerations, infection, obesity, preeclampsia, magnesium
Background Some maternal blood loss normally occurs at the time of vaginal delivery. The best estimates indicate that a loss of approximately 500 mL is average, with a range of about 250-700 mL.[1,2] Some of this bleeding arises from birth canal lacerations or surgical incisions (i.e., episiotomy),