Abstract Spontaneous rupture of an ovarian artery aneurysm or pseudoaneurysm (OAA) is a rare, life-threatening cause of retroperitoneal hemorrhage. We present a patient with an undiagnosed left ovarian pseudoaneurysm that ruptured two days after an uneventful vaginal delivery. This condition was initially masked by typical puerperal changes and postpartum complications, however, an urgent transcatheter arterial...