避孕失败的计划外妊娠,在早孕时一般采取负压吸引术,月份较大者用钳刮术,皆是手术方法,既然是手术,就会有一定并发症。尤其在剖腹产数月后妊娠与子宫畸形者,给手术带来一定难度。最近五年来,我科摸索药物抗早孕的规律,重点研究前列腺素(PG)与天花粉,现分述如下。前列腺素F_2α可以促使子宫节律性收缩,将孕胚与子宫壁分离而排出体外。最初用dl-15-甲基PGF_2 α薄膜,每2小时阴道放药一次,后改用栓剂或海棉每8小时放药一次。为了 Unplanned pregnancy contraceptive failure, in the first trimester to take negative pressure aspiration, the greater the month with forceps curettage, are surgical methods, since it is surgery, there will be some complications. Especially in the cesarean section after a few months of pregnancy and uterine malformations, to surgery to bring some difficulty. In the recent five years, I explored the law of drug anti-early pregnancy, focusing on prostaglandin (PG) and TCS, are described below. Prostaglandin F_2α can promote uterine rhythmic contraction, the embryo and uterine wall separation and excreted. Initially with dl-15-methyl PGF_2 α film, vaginal release every 2 hours once, after the switch to suppository or sponge release of drug every 8 hours. in order to