Late-onset postpartum hemorrhage from placental bed subinvolution: a case report.

Background: Placental bed subinvolution is an underestimated cause of severe, late-onset postpartum hemorrhage.

Case: A case of placental bed subinvolution caused abnormal uterine bleeding in the late postpartum period. Because of difficulties in establishing the diagnosis, massive, intractable and life-threatening uterine hemorrhage occurred, leading to hysterectomy.