What is one of the most common causes of postpartum hemorrhage?

Uterine atony is recognized as one of the most common causes of postpartum hemorrhage. This condition occurs when the uterus fails to contract effectively after delivery, which can lead to excessive bleeding. The mechanism behind this involves the uterus not being able to constrict the blood vessels that have previously supplied the placenta, resulting in significant blood loss.

Postpartum hemorrhage is a serious complication that requires prompt recognition and management. Uterine atony is particularly common due to factors such as prolonged labor, overdistension of the uterus (from multiple gestations or excessive amniotic fluid), and certain medications. Recognizing and addressing uterine atony early can significantly reduce morbidity and mortality associated with postpartum hemorrhage.

Other potential causes, such as infection, placenta previa, and pre-eclampsia, can certainly contribute to labor and delivery complications but do not represent the most frequent cause of postpartum hemorrhage in the immediate aftermath of childbirth.