我院于1983年12月至1985年12月间对既往带环怀孕、脱环怀孕及脱环的90例受术者改置T 型宫内节育器,取得较好效果,现将随访情况报道如下。本组90例均是置金属单环而失败者(见表1),其中工人、干部70例,农民20例。 In our hospital from December 1983 to December 1985 90 pregnant women who had pregnancy, decongestation and deprotecting were retrospectively treated with T-IUD, and good results were obtained. The follow-up reports as follows. The group of 90 cases were the losers of the metal ring (see Table 1), of which 70 workers and cadres and 20 peasants.