Objective To explore and analyze the clinical effect of bilateral internal iliac artery balloon occlusion on cesarean section for patients with pernicious placenta previa.Methods A total of 80 puerperae with pernicious placenta previa undergoing cesarean delivery in the Affiliated Hospital of Sichuan North Medical College during January 2015 to January 2016 were selected and were divided into control group and observation group by random number table method with 40 cases in each group.The patients in the co...