1[1]Johnson N. Intracervical tests:Usage and mode of action. Obstet Gynecol Surv,1989,44:410~20.
2[2]Ho PC, Liang ST, Tang GWK, et al. Pre-operative cervical dilatation in termination of first trimester pregnancies using 16, 16-methy-trans-PGE1 methyl ester vaginal pessaries. Contraception,1983,27:339~46.
3[3]Norman JE,Thong KF,Baird DT. Uterine contractility and induction of abortion in early pregnancy by misoprostol and mifepristone. Lancet, 1991,338 : 1233~6.
4[4]Ho PC,Chan YF,Lau W. Misoprostol is as effective as gemeprost in termination of second trimester pregnancy when combined with mifepristone: A randomized comparitive trial. Contraception, 1996,53:281~3.
5[5]Toppozada MK, Anwar MY,Hassanan HA,et al. Oral or vaginal misoprostol for induction of labor. Int-J-Gynecol Obstet, 1997,56(2) :135~9.
6[6]Herceg J,green K,Bygdeman M. Physiological and biochemical implications of prostaglandins from the perspective of developing safer first and second-trimester obstetrics. Acta physiological Hongarica, 1988,71 (2): 159~ 163.
7[7]Ding JQ,Granberg S,Norstrom A. Clinical effects and cervical tissue changes after treatment with 16,16 dimethyel-trans 2PGE1,menthylester in the first trimester, Prostaglandins, 1990, 39 (3):281~285.
8[8]Singh K, Fong YF, Prased RN, et al. Evacuation interval after vaginal misoprostol for preabortion cervical priming :a randomized trial. Obstet Gynecol, 1999,94 (3): 431~4.
9[9]Singh K,Fong YF,Prasad RN,et al. Vaginal misoprostol for preabortion cervical priming:is there an optional evacuation time interval? Br-J-Obstet-Gynecol, 1999, 106 (3): 266 ~ 9.
10[10]Ngai SW,Tang OS,Lao T,et al. Oral misoprostol versus placebo for cervical dilatation before vacuum aspiration in first trimester pregnancy. Human Reprod, 1995,10:1220~ 1222.