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紧急避孕(EC)系指无保护的性交后,妇女用预防妊娠的方法(未避孕或避孕意外),是一种补救措施,某种意义上具有临时性,这种方法可以减少非意愿性妊娠,降低人工流产率及流产死亡率。 EC的历史可追溯到公元前1500年古埃及,当时就有口服或阴道给药进行EC的记载。直到19世纪60年代,产生了高剂量雌激素用作EC。由于副作用发生率高而未得到推广。70年代,Yuzpe报道了雌孕激素联合用于EC,产生了“Yuzpe”法。同期,放置宫内节育器作为EC也取得了成功。近年来,孕激素
Emergency contraception (EC) refers to women’s use of preventative pregnancy (un-contraception or contraception) after unprotected intercourse and is a remedy, in a sense temporary, that reduces unwanted pregnancies , Reduce the rate of abortion and abortion mortality. The history of the EC dates back to 1500 BC in ancient Egypt, when oral or vaginal administration was documented. Until the 1860s, high doses of estrogen were produced for use as EC. Because of the high incidence of side effects has not been promoted. In the 1970s, Yuzpe reported the combined use of estrogen and progestogen for EC, resulting in the “Yuzpe” method. Over the same period, placement of an IUD as an EC has also been successful. In recent years, progesterone