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硅橡胶盾形宫内节育器(以下简称盾形器)。是由晨光化工研究院三分厂提供制品,本组自一九七七年三月至一九七九年六月底止,经过二十八个月临床试用随访2363例,
Silicone rubber shield IUD (hereinafter referred to as shield). Is a product provided by the Third Branch of Chenguang Chemical Research Institute. Since March 1967 to the end of June 1979, the group has followed up 2363 clinical trials for 28 months,