Antepartum hemorrhage (APH) often leads to uterine atony due to the disruption of normal uterine muscle function and placental site trauma. This increases the risk of postpartum hemorrhage (PPH) as the uterus fails to contract adequately after delivery, leading to excessive bleeding. Additionally, APH-associated placental abnormalities, such as placenta previa or abruption, predispose to poor hemostasis postpartum. Hence, PPH is recognized as the most common and serious maternal complication following APH. Early identification and management are essential to reduce morbidity and mortality.

Reference: Williams Obstetrics, Cunningham FG, 25th Edition.