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国内节育手术常规中金属节育环放置期限原为5年。1973年卫生部批发的节育手术常规中,将金属环放置期限又改为7～10年。到期需要取环或换环。 1960年起,我院开始放置金属节育环,迄今已十七年之久。为研究延长金属节育环的放置期限,探讨妇女绝经后取环的可能性,观察延长带环期限后对人体健康有
Conventional birth control surgery in place of metal IUD for 5 years. In 1973 the Department of Health wholesale contraception routine, the metal ring placement period and changed to 7 to 10 years. Expiration need to take ring or change ring. Since 1960, our hospital has started to place metallic IUDs, which have been for 17 years. In order to study the extension of metal IUD placement period, to explore the possibility of women taking the ring after menopause, observe the extension of the ring period after the human health have