Tài liệu Báo cáo y học: "Maternal Outcomes According to Placental Position in Placental Previa"

Generally, the frequency of placental previa is 4 in 1,000 patients. Risk factors are old age, multiparity, previous cesarean delivery, abortion, smoking, cocaine, and male fetus [1]. In previa patients, postpartum hemorrhage is substantial, which increases maternal complications [2]. Risk factors for massive hemorrhage and transfusion are old age, abortion, previous cesarean section, uterine myoma, increased BMI, increased neonatal weight, and complete previa [3-5]. Also, risk factors for peripartum hysterectomy are previous cesarean section, history of abortion, and complete previa [6].