Rare Presentation of a Viable Secondary Abdominal Ectopic Pregnancy in the Rudimentary Horn of a Bicornuate Uterus: A Case Report.

An advanced abdominal in a rudimentary horn pregnancy is rare and difficult to diagnose, especially in late gestation. Accurate early recognition, multidisciplinary planning, and preoperative vascular interventions are critical. With precise surgical management, even in high-risk scenarios, favorable maternal and neonatal outcomes can be achieved despite significant complications.