瑞士制成一种堵塞性宫内节育器(intrau-terine occlusion body,简称IUB),它在现有宫内节育器的基础上进一步作了改进,即在节育器双上角装有堵塞体,起堵塞子宫输卵管开口处作用,使避孕效果更佳。本文受试者的年龄多数为21～45岁(88%),其中74%是经产妇女,26%是未产妇女。由于IUB堵塞体直径仅为3mm,放取容易,经产者不必使 Switzerland made an obstructive intrauterine device (intrau-terine occlusion body, referred to as IUB), which is based on the existing IUD to be further improved, that is installed in the double upper corner of the IUD plug body, From the blockage of the uterine tubal opening role, so that better contraception. The majority of subjects in this study were 21-45 years old (88%), of whom 74% were mothers and 26% were mothers. Due to IUB plug body diameter of only 3mm, easy to take, the producers do not have to make