Comparison of two uterine cavity-shaped IUDs
Gu, Z.Q.
Contraception 46(3): 221-226
1992
ISSN/ISBN: 0010-7824 PMID: 1451518 DOI: 10.1016/0010-7824(92)90003-cDocument Number: 323219
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.