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为提高宫内节育器的避孕效果,近年来开展了释放孕激素的宫内节育器的研究。这种节育器具有较长的使用期,较好的接受性以及较高的避孕效果。自从临床上应用孕酮宫内器之后,又有人试用一种合成孕激素—d-高诺酮宫内器以达到更好的避孕效果。由此研究者们就联想到应用其它有效的合成孕激素。作者认为炔诺酮(NET)既价廉、又有较好的避孕效果,因此进行了研究。目的在于观察宫内给予NET后对卵巢功能以及出血控制方面的影响。
In order to improve the IUD contraception, in recent years, the release of progesterone IUD research. This IUD has a longer period of use, better receptivity and higher contraceptive effectiveness. Since the clinical application of progesterone intrauterine device, another trial of a synthetic progesterone-d-metoprolol intrauterine device to achieve better contraception. As a result, researchers are reminded of the use of other potent synthetic progestins. The authors consider that norethindrone (NET) is inexpensive and has good contraceptive efficacy and is therefore studied. The purpose is to observe the effect of intrauterine administration of NET on ovarian function and bleeding control.