2Aimin Chen, Wei Yuan, Meirik O, et al. Mifepristone - induced early abortion and outcome of subsequent wanted pregnancy. Am J Epidemiol,2004,160(2) :110 - 117.
3Allen RH, Westhoff C, Nonno LD, et al. Curettage After Mifepristone - Induced Abortion : Frequency, Timing, and Indications. Obstet Gynecol,2001,98( 1 ) :101 - 106.
4Hogue C J, Cates W Jr, Tietze C . The effects of induced abortion on subsequent reproduction. Epidemiol, 1982,4:66 - 94.
5Grimes DA. Medical abortion in early pregnancy : a review of the evidence . Obstet Gynecol, 1997,89:790 - 796.
6Creinin MD, Spitz IM. Use of various ultrasound criteria to evaluate the efficacy of mifepristone and misoprostal for medical abortion. Am J Obstet Gynecol, 1999,181 : 1419 - 1424.
