反复研究已指出,在采用可逆避孕方法妇女中,使用IUD者持续率最高。有效,延长使用和可接受以及节育器的适中价格这些因素已允许IUD在全世界计划生育中起主要作用。材料和方法有两种应用广泛的节育器即含药和不含药的,每种可分为两组,不锈钢环形和塑料 Repeated studies have pointed out that in women who use reversible contraception, the use of IUD sustained the highest rate. Factors that are effective, prolonged use and acceptable, and moderate prices for IUDs have allowed IUDs to play a major role in family planning throughout the world. Materials and Methods There are two widely used IUDs, drug-free and drug-free, each divided into two groups, stainless steel rings and plastic