Five year clinical experience with the Copper 7 intrauterine device

The clinical observation of 1547 patients who had a Copper 7 IUD inserted in a municipal hospital in New York City during the period August 1, 1974 to July 31, 1979, is presented. Despite the extreme mobility of this lower socio-economic population, complete followup was possible for 79% of the insertions. The demographic characteristics of the patients are presented, as well as the number of events and closures for the first segment of use and for all segments. The events are analyzed by patient's age, gravidity, parity and duration of use. Net annual rates for accidental pregnancies, expulsions and removals, as well as continuation rates are presented for the first 3 years of use. Net cumulative rates for the same events are presented for the 5 years of the study.