埃及的一个骆驼夫,将石头置入动物子宫,是第一个借助于异物来达到不育试验的人。随后Richter、Gr(?)fenberg和Ota发明用肠线、银环和不锈钢环置入子宫的避孕法。至六十年代才知道塑料环代替不锈钢环的避孕方法。虽然已发明70多型的环,但只有少数几种被采用。目前已使用含有生物活性的第二代宫内节育器(IUDs)。节育器的形状、表面及其大小影响避孕效果及副作用。无活性的宫内节育器,如在宫腔里很适应或与子宫表面贴得越紧,失败率及脱出率就越小。但只有较大的可靠性,而使副作用增加,特别是痉挛性疼痛和出血,达尔康盾宫内节育 One of Egypt’s camel husband, the stone into the animal’s uterus, is the first to use foreign bodies to achieve infertility test. Then Richter, Gräfenberg, and Ota invented the contraceptive method of laying the uterus with a gut, a silver ring, and a stainless steel ring. Until the sixties did not know the plastic ring instead of stainless steel ring contraceptive methods. Although more than 70 rings have been invented, only a few have been adopted. Second generation intrauterine devices (IUDs) with biological activity have been used. IUD shape, surface and size of contraceptive effects and side effects. Inactive IUD, such as in the uterine cavity is adapted to or with the uterine surface more tightly, the failure rate and prolapse rate is smaller. But only greater reliability, and increased side effects, especially spastic pain and bleeding, dalconazole intrauterine