摘要
This is an experimental epidemiologic study comparing the performance of Stainless Steel Ring ( SSR) , Uterine Cavity-Shaped Device ( UCD ) , MLCu250 and TCu220c in breastfeeding women peasants, 711 healthy women, para 1 and gravida 1,22-32years of age, 3-9 months post-partum were randomly allocated to 4 groups receiving 4 different devices single-blindedly. They were followed up regularly. The results showed that 28 months after insertion, the use-ralated termination rates of UCD appeared to be the lowest,followed by MLCu250, TCu220c, and SSR in an increasing order. There were very significant differences among the use-related termination rates of four IUDs. SSR had higer termination rates than those of MLCu250 and TCu220c. The removals due to bleeding and pain were much higher in TCu220c than in MLCu250.
