为了解活性宫内节育器（ＩＵＤ）的安全性和长期使用效果，对我所１９８９ 年间放置的ＭｕｔｉｌｏａｄＣｕ３７５ＳＬ（ＭＬ） ＩＵＤ ３２５ 例进行使用８ 年的随访分析。结果：使用８ 年时净累积续用率、粗累积妊娠率、脱落率及因症取出率分别为７１．３４、７．７６、５．０２ 及１１．３８／１００ 妇女；置器后３０ 个月时血红蛋白较术前略有降低，但到６０ 个月时，差异已无显著性；宫颈防癌涂片及体重变化皆在正常范围。结果提示ＭＬＩＵＤ放置８ 年安全、有效、可接受性好 In order to understand the safety and long-term efficacy of IUD, 325 patients with MutiLifeCu375SL (ML) IUD placed in our hospital in 1989 were followed up for 8 years. Results: After 8 years, the cumulative net pregnancy rate, the cumulative pregnancy rate, the rate of exfoliation and the rate of removing were 71.34, 7.76, 5.02 and 11.38 / 100 respectively; Month hemoglobin slightly lower than preoperative, but by 60 months, the difference has no significant; cervical smears and weight changes are in the normal range. The results suggest that MLIUD is safe, effective and acceptable for 8 years