5Fiala C,Safar P,Bygdeman M,et al.Verifying the effectiveness of medical abortion;ultrasound versus hCG testing.Eur J Obstet Gynecol Reprod Biol,2003,109:190-195.
6中华医学会.临床技术操作规范:计划生育学分册.北京:人民军医出版社,2004:1-6.
7Ben-Ami I, Schneider D, Svirsky R, et al. Safety of late second- trimester pregnancy termination by laminaria dilatation and evacuation in patients with previous multiple cesarean sections. Am J Obstet Gynecnl, 2009,201 : 154. e1-5.
8Nguyen TV. Vaginal birth after cesarean section at the university of Texas. J Repord Med Gyneeol,1992,37: 880-884.
9Shammas AG, Momani MD. Misoprostol for termination of second trimester pregnancy in a scarred uterus. Saudi J, 2006, 27 : 1173- 1176.
10Dickinson JE. Misoprestol for second-trimester pregnancy termination in women with a prior cesarean delivery. Obster Gynecol, 2005, 105:352-356.