9[1]Cande V Ananth,Smulian JC,Vintzileos AM,et al. The association of placenta previa with history of cesarean delivery and abortion: A metaanalysis. Am J Obstet Gynecol,1997,177:1071-1078.
10[2]Dwight J Rouse,Owen J. Prophylactic cesarean delivery for fetal macrosomia diagnosed by means of ultrasonography-A Fustian bargain ? Am J Obestet Gyneco,1999,181:332-338.
