5Waller DK, Lusting LS, unningham GC, et al. The association between maternal serum alpho-fetoprotein and preterm birth, small for gestational age infants, preeclampsia and placental complications[J]. Am J Obestet Gynecol, 1996,88:816-822.
6Butler EL, Dashe JS, Ramus RM, et al. Association between maternal serum alpha-fetoprotein and adverse outcomes in pregnancies with placenta previa[J]. Am J Obestet Gynecol, 2001,97: 35-38.
7WANG You ( Chief Editor ). Trichosanthin ( in Chinese). 2nd ed, Shanghai: Science Publishing Co, 2000, p. XV
8LU Pei-xin & JIN Yu-cui. Analysis of treatment of ectopic pregnancy with Trichosanthin of 71 cases. Shanghai Medicine (in Chinese), 1988,6 : 337~ 339.
9Breen JL, Neubecker R,Gyegori CA, et al. Placenta accreta, increta, and percreta: a survey of 40 cases. Obstet Gynecol, 1977, 49:43.
10Read JA, Cotton DB & Miler FC. Placenta accreta:changing clinical aspects and outcome. Obstet Gynecol, 1980, 56:31.
5Chou MM, Ho ES. Lee YH. Prenatal diagnosis of placenta previa accret by transabdominal color Doppler ultrasound [J]. Ultrasound Obster Gynecol, 2000, 15(1): 28-35.
6Masselli G, Brunelli R, Casciani E, etal, Magnetic resonance imaging in the evaluation of placental adhesive disorders: corre- lation with color Doppler ultrasound [J]. Eur Radiol, 2008, 18(6): 1292-1299.
7Esakoff TF, Sparks TN, Kaimal AJ, et al. Diagnosis and morbidi- ty of placenta accrcta[J]. Ultrasound Obstet Gynecol, 2011, 37(3): 324-327.
8Maher MA, Abdelaziz A, Bazeed MF. Diagnostic accuracy of ul- trasound and MRI in the prenatal diagnosis of placenta accreta [J]. Acta Obstet Gynecol Scand, 2013, 92(9): 1017-1022.
9Peker N, Turan V, Ergenoglu M, et al. Assessment of total pla- centa previa by magnetic resonance imaging and ultrasonography to detect placenta accreta and its variants[J]. Ginekol Pol, 2013, 84(3): 186-192.
10Pinho S,Sarzedas S,Pedroso S,et al.Partial placenta increta and methotrexate therapy:three case reports[J].Clin Exp Obstet Gynecol,2008,35(3):221-224.