3Miller DA, Chollet JA, Goodwin TM. Clinical risk factors for placenta previa-placenta accreta[J]. AmJ Obstet Gynecol, 2007, 177(1): 210- 214.
4Sherer DM, Gorelick C, Zigalo A, et al. Placenta previa percreta managed conservatively with methotrexate and multiple bilateral uterine artery embolizations[J]. Ultrasound Obstet Gynecol, 2007, 30(2): 227-228.
5Committee on Obstetric Practice. ACOG committee opinion.Placenta accreta. Number 266, January 2002. American College of Obstetricians and Gynecologists [J]. Int J Gynaecol Obstet, 2002,77(1) :77-78.
6Umezurike CC, Nkwocha G. Placenta accreta in Aba, south eastern Nigeria[J]. NigerJ Med, 2007, 16(3): 219-222.
7Woodring TC, Klauser CK, Bofill JA, et al. Prediction of placenta accreta by ultrasonography and color doppler imaging[J]. J Matern Fetal Neonatal Med, 2011, 24(1): 118-121.
8Comstock CH, Love JJ Jr, Bronsteen RA, et al. Sonographic detection of placenta accreta in the second and third trimester of pregnancy[J]. AmJ Obstet Gynecol, 2004,190(4):1135-1140.
9Chou MM, Ho ES, Lee YH. Prenatal diagnosis of placenta previa accreta by transabdominal color Doppler ultrasound[J]. Ultrasound Obstet Gynecol, 2000, 15 ( 1 ): 28- 3 5.
10Kim JA, Narra VR. Magnetic resonance imaging with true fast imaging with steady-state precession and half-Fourier acquisition single-shot turbo spin-echo sequences in cases of suspected placenta accreta[J]. Acta Radiol, 2004, 45(6): 692-698.