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宫内节育器(IUD)由古代节育器发展而来,是一种避孕效果好、安全经济、可逆、使用方便的避孕工具,主要分为惰性宫内节育器和活性宫内节育器两大类,其中带铜宫内节育器是目前使用最为广泛的一类宫内节育器。在国内各种避孕措施中,宫内节育器使用的妇女约占40%。宫内节育器的作用机制主要是子宫内膜的一种局部的组织反应,从而达到抗受精卵着床和影响胚胎发育的目的。正常月经周期中
IUD, developed from an ancient IUD, is a contraceptive that is effective, safe, economical, reversible and easy to use. It is divided into two categories: Inert IUD and IUD , With copper IUD is currently the most widely used type of IUD. Among the various contraceptive measures in the country, IUDs account for about 40% of women. The mechanism of intrauterine device is mainly a kind of local tissue reaction of endometrium, so as to achieve anti-fertilized egg implantation and affect embryonic development. Normal menstrual cycle