7Fylstra DL.Ectopic pregnancy within a cesarean scar:a review.Obstet Gynecol Surv,2002,57:537-543.
8Grobman WA,Gersnoviez R,Landon MB,et al.Pregnancy outcomes for women with placenta previa in relation to the number of prior cesarean deliveries.Obstet Gynecol,2007,110:1249-1255.
9Abbas F,Talati J,Wasti S,et al.Placenta precerta with bladder invasion as a cause of life threatening hemorrhage.J of Urolog,2000,164:1270-1274.
10Mok M,Heidemann B,Dundas K,et al.Interventional radiology in women with suspected placenta accreta undergoing caesarean section.International Journal of Obstetric Anesthesia,2008,17:255-261.