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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 references a growing number of academic resources related to restorative reproductive medicine.
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