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为优选适合我国妇女子宫的节育器,1987年2月~1990年4月,我们分别对使用不锈钢圆环、不锈钢麻花环和T_(Cu220)C型三种IUD的300名妇女进行了临床效果对比.
In order to optimize the use of IUDs for women’s uterus in our country from February 1987 to April 1990, we compared the clinical effects of 300 IUDs using stainless steel rings, stainless steel cannulas and T_ (Cu220) C type IUDs respectively .