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本文调查对比了475例农村妇女先后两次放置金属单环的使用效果。结果表明首次放环的累计续存率明显低于第2次,两者相差有非常显著意义(P<0.01)。同时证明首次放环后的任何结局,对第2次放环不存在明显影响。前后两次放环间隔时间的长短,对2次放环的使用效果,有一定影响,原因有待进一步深入探讨。根据本次调查可以认为第2次放置金属单环,在当前仍是农村行之有效、安全、经济、简便的一种节育措施。
This article surveyed the use of 475 cases of rural women twice successively placed single metal ring. The results showed that the cumulative survival rate of the first release ring was significantly lower than the second, the difference between the two has a very significant (P <0.01). At the same time, it is proved that any outcome after the first release of the ring has no obvious effect on the second release of the ring. Before and after the release of the two ring interval time, the use of the two release ring effect, to a certain extent, the reasons for further in-depth discussion. According to this survey, it can be considered that placing the metal single ring for the second time is still an effective contraceptive measure that is effective, safe, economical and simple in rural areas.