There are many kinds of intrauterine device in use, which have their own characteristics, and all are active intrauterinedevices.
目前使用的宫内节育器种类较多，且各有特点，均为活性宫内节育器。
2
Objective To understand the relationship between intrauterinedevices (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。
3
Intrauterinedevices (IUD); Adverse reactions; Community service; Control intervention.