“…The main primary causes are uterine atony (∼70% of cases), retained placental fragments, endometritis, genital laceration, uterine inversion or rupture, and coagulation disorders. Delayed postpartum hemorrhage, affecting 1∼3% of deliveries, occurs 24 h to 6 weeks postpartum and is usually due to endometritis, retained products of conception, or sloughing of the placental site eschar, and vascular abnormalities affecting the myometrial circulation (arterial aneurysm, pseudoaneurysm, and arteriovenous malformations) (4,5).…”