5Miller D A, Chollet T A, Goodwin T M. Clini-cal risk factors for placenta previa-placenta accreta [J]. AM J Obstet Gyneco,1997, 177(1):210-214.
6McDuffie R S, Harkness L, Mevay R W, et al. Midtrimester hemoperitoneum caused by placenta in association with elevated maternal serum alpha-feto-protion level[J]. Am J Obstel Gyneol, 1994, 171(2):565-567.
8Florenceree Bretlle, Blandine Courbiere, Chafika Mazouni, et al Management of placenta accreta :Morbidity and outcome [J] European Journal of Obstel & Gyneol and Reproductive Biology, 2007, 133(1):34-39.
