Long-term use effectiveness of the CU-7-200 IUD.

Zipper, J., Medel, M., Osorio, A., Goldsmith, A. and Edelman, D. A. (Escuela de Medicina, Universidad de Chile, Santiago, Chile and International Fertility Research Program, Research Triangle Park, North Carolina, USA). Long-term use effectiveness of th, CU-720i0 1UD. Int JGynaecol Obstet 14: 142-144, 1976. Copper-containing IUDs have been demonstrated to be as good, if not better, than other presently used inert devices. There is,however, no consensus on the duration of contraceptive effectiveness of coppercontaining IUDs. The long-term contraceptive effectiveness of one copper-containing IUD, the CU-7-200 Gravigard*, is evaluated in this report on 514 patients. IUDs were inserted in the intermenstrual period and patients were followed up for as long as 63 months, The probability of pregnancy, expulsion, or removal for medical reasons did not increase with increasing duration of IUD use, but instead appeared to slightly decrease with increasing duration of IUD use. The resuits of this study indicate that the CU-7-200 continues to be an effective contraceptive for at least five years after insertion.