title: Comparison of two uterine cavity-shaped IUDs.
abstract: For the purpose of lowering the pregnancy rate of the uterine cavity-shaped stainless steel IUD (first generation UCD) and maintaining its advantages, the copper-plated uterine cavity-shaped IUD (second generation UCD or UCDcu) was designed. A randomized use-effectiveness study in ten centres with the UCDcu and UCD have been analyzed at twelve months. The UCDcu had a significantly lower pregnancy rate (0.3 per 100 women) than the UCD (2.9 per 100 women), p less than 0.005. Whereas, the other cumulative rates such as expulsion, removals for bleeding and pain, and other personal were not significantly different for the two IUDs, p greater than 0.05.
authors.affiliation: Department of Obstetrics and Gynecology, Nan-Tong Mining Area People's Hospital, Chongqing, China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Gu
mesh_terms: D000328:Adult; D004867:Equipment Design; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007435:Intrauterine Devices, Copper / Q000009:adverse effects