Comparison of two uterine cavity-shaped IUDs.

Author(s): Gu ZQ

Affiliation(s): Department of Obstetrics and Gynecology, Nan-Tong Mining Area People's Hospital, Chongqing, China.

Publication date & source: 1992-09, Contraception., 46(3):221-6.

Publication type: Clinical Trial; Comparative Study ; Randomized Controlled Trial

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.