Objective:To study the effect between Ethinylestradiol combined Rivanolum and Misoprostil and sole Rivanolum for stoping the metaphase and late pregnancy.

• 目的:探讨炔雌醇、利凡诺、米索前列醇联合和单用利凡诺中止中、晚期妊娠的临床疗效。