印度医学研究会对几种类型的宫内节育器(IUD)进行了临床试验,根据其中的某些结果所见,CuT200已引进应用。由于研究的不断进展,已发展了较新一代的IUDs,如释放激素的IUDs和在铜丝中具银心的铜IUDs。这些改进的节育器或因有较好的效果和较小的副作用而易于为人们所接受,或有延长避孕期限的优点。印度医学研究会在1983年8月在不同地区开始多中心的随机临床比较性研究。其主要目的是将较新的IUDs——左旋18-甲基炔诺酮(LNG)、CuT380Ag和CuT220C与近代应用的CuT200B比较,本文摘录了应用这些IUDs36个月的结果。受试者为健康志愿妇女,有生育能力,年龄18～40岁月经规则,随机分配4种类型IUD,即LNG、CuT380Ag、CuT220C和CuT200B,在月经10天内或人工流产时放入,受试者在放器后1周、 The Indian Medical Research Council conducted clinical trials of several types of IUDs, and based on some of these findings, CuT200 has been introduced. As research progresses, more recent generations of IUDs have been developed, such as hormone-releasing IUDs and silvered copper IUDs in copper wire. These improved IUDs are either easily acceptable or have the advantage of prolonging the duration of contraception due to better efficacy and less side effects. The Indian Medical Research Society began a multicenter randomized comparative clinical study in different regions in August 1983. Its main purpose is to compare the newer IUDs - levonorgestrel (LNG), CuT380Ag, and CuT220C with CuT200B, a recently applied one, and this article summarizes the results of 36 months of use of these IUDs. Subjects were healthy, volunteer women with fertility and age 18 to 40 years old. Four types of IUDs, LNG, CuT380Ag, CuT220C and CuT200B, were randomly assigned to be placed within 10 days of menstruation or induced abortion. Subjects 1 week after the device,