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Contraception. 1984 Nov;30(5):443-56. doi: 10.1016/0010-7824(84)90036-2.
Intrauterine contraception with copper and with levonorgestrel: a randomized study of the TCu 380Ag and levonorgestrel 20 mcg/day devices.
Sivin I, Alvarez F, Diaz J, Diaz S, el Mahgoub S, Coutinho E, Brache V, Diaz MM, Faundes A, Pavez M, et al.
Research Library
The largest, free collection of academic references related to restorative reproductive medicine— made possible by donations.
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