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  • Title: Clinical studies on Cu-7; copper-IUD.
    Author: Matsumoto S.
    Journal: Nihon Funin Gakkai Zasshi; 1976 Jul; 21(3):70-82. PubMed ID: 12158549.
    Abstract:
    The effectivenss and acceptability of the Copper-7 (Cu-7) IUD was assessed over a total of 8064.5 woman-months calculated by the life-table method of Tietze-Lewit, were accidental pregnancy, 3.1; spontaneous expulsion, 3.2; removal for bleeding and/or pain, 3.7; removal for other medical reasons, .5; removal for planned pregnancy, 5.3; and removal for other personal reasons, 5.2. The overall termination rate was 21/100 women. Most of the side effects occurred within the first 6 months of use. There were no cases of pelvic infection. The incidence of side effects and the reversibility of the method did not appear to be affected by the addition of copper to the device. Serum progesterone, estrogen, copper, and iron levels remained within the normal range. No marked endometritis was observed. It is concluded that the CU-7 IUD is a safe and effective contraceptive device.
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