Effectiveness and acceptability of intra-uterine contraceptive devices.

Abstract

This paper summarizes the results of the first 20 months of a cooperative statistical program, undertaken by the National Committee on Maternal Health, for the purpose of evaluating the effectiveness, safety, and acceptability of intra-uterine contraception. Four types of devices (spiral, loop, bow, and ring) are discussed and compared in terms of pregnancy, expulsion, and removal rates.