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采用B超对某大学121例放置宫内节育器的妇女进行10年定期随访观察，发现：（1）宫内孕5例，宫外孕1例；带器妊娠率4．96％（1．09％～8．83％）；（2）合并子宫肌瘤4例，宫内膜异位2例，卵巢囊肿3例，畸胎瘤1例；合并症发病率8．26％（3．36％～13．17％）。由此说明，B超在IUD术后随访中的重要意义。
Using B-ultrasound to observe 121 women with IUD in a university for 10 years, we found: (1) 5 cases of intrauterine pregnancy and 1 case of ectopic pregnancy; pregnancy rate of pregnancy was 4.96% (1.09% ~ 8.83%); (2) 4 cases of uterine fibroids, 2 cases of endometriosis, 3 cases of ovarian cysts and 1 case of teratoma. The incidence of comorbidity was 8.26% (3.36% 13.17%). This shows that B-ultrasound in the follow-up of IUD significance.