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妊娠中期子宫,由于受体内大量孕激素的影响,处于比较不敏感的状态,这就给引产带来一定困难,而妊娠中期的孕妇,目前在人工流产中还占有相当比例,对这一部分孕妇,若再不终止妊娠,势必增加出生率,因此,寻找一种安全而可靠的方法,已成为当前节育中的一个重要课题。1974年以前,我们沿用水囊引产法,虽然成功率也高,但由于易于感染,并偶可出现严重并发症,而后为天花粉所替代。又经过二年的试用,
Pregnancy uterus, due to a large number of progesterone receptors in the relatively insensitive state, which will bring some difficulties in induction of labor, and pregnant women in the second trimester, abortion now also holds a considerable proportion of this part of pregnant women If we do not terminate the pregnancy, it is bound to increase the birth rate, therefore, to find a safe and reliable method has become an important issue in current birth control. Before 1974, we follow the water bag induction method, although the success rate is high, but because of easy infection, and even serious complications, and later replaced by the TCS. After two years of trial,