Objective To understand the relationship between intrauterine devices (IUDs) with and without tail and ectopic pregnancy (EP) and reproductive system diseases.
目的了解有无尾丝型宫内节育器（IUD）与异位妊娠（EP）及生殖系统疾病的关系。
BackgroundAt present, China's intrauterine devices (IUDs) have a high failure rate and there is space for improvement in terms of insertion service management.
背景当前，我国宫内节育器(IUD)放置失败率高，提高放置服务的管理水平以降低失败率有较大空间。
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