5Huang WH, Nakashima DK, Rumney PJ, et al. Interdelivery interval and the success of vaginal birth after cesarean delivery.Obstet Gynecol, 2002, 99(1) :41 -4.
6Nguyen UV. Vaginal birh afer cesarean section at he university of Texas. J Reported Med Gynecol, 1992, 37(10) : 880- 4.
6Aahok P W, Templeton A , Wagaarach chi P T, et al. Midtrimester medical termination of pregnancy; a review of 1002 consecutive cases.Contraception,2004,69 ( 1 ) :51
7Ngai S W, Tang O S, Ho P C. Randomized comparison of vaginal (200 microg erery 3 h) and oral (400 microg every 3 h) misoprostol when combined with micfepristone in termination of second trimester pregnancy . Hum Repord, 2000,15 ( 10 ) : 2205
8Tang O S, C h an C C, Kan A S,et al. A prospective randomized comparison of sublingual and oral misoprestol when combined with misfepristone for medical abortion at 12 - 20 weeks gestation . Hum Reprod,2005,20(11) :3062