Abstract: Incidence of pernicious placenta previa present a trend of rising in recent years. Pernicious previa complicating placenta increta is the leading cause of postpartum hemorrhage. The clinical treatment of the above condition is rather difficult and poses a serious threat to maternal life. The main contributory factor is the imbalance between uterine decidua development and chorionic villi cells invasion during uterin scaring formation process. Effective treatment of intrapartum and postpartum hemorrhage is the key to deal with pernicious placenta previa. Nowadays, treatment options for placenta previa include internal and external compression of uterine, selective devascularization by ligation of the upper branch of the uterine artery, local compression with uterine sutures, iliac artery embolization and uterine artery embolization. Lower abdominal aorta balloon occlusion is a feasible procedure that can effectively reduce the amount of bleeding, requires a short X-rays exposure time, does not impair fetal, less affect maternal blood circulation, makes surgery area clear, and gives operator the chance to consider carefully to make a decision. Lower abdominal aorta balloon occlusion presents more and more advantages to treat pernicious placenta previa and may be an effective preventive measure to reduce postpartum hemorrhage in the future.

Key words: Placenta previa, Placenta accreta, Balloon dilatation, Aorta，abdominal, Postpartum hemorrhage