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Gynecologic Investigation|January 1, 1975
Contractility of the fallopian tubeE M Coutinho, H Maia, C E MattosContraception|October 1, 1978
Contraception with long acting subdermal implants: I. An effective and acceptable modality in international clinical trialsE Coutinho, A R da Silva, C E Mattos, et al.Contraception|November 1, 1991
Prolonged intrauterine contraception: a seven-year randomized study of the levonorgestrel 20 mcg/day (LNg 20) and the Copper T380 Ag IUDSI Sivin, J Stern, E Coutinho, et al.Contraception|March 1, 1987
Two years of intrauterine contraception with levonorgestrel and with copper: a randomized comparison of the TCu 380Ag and levonorgestrel 20 mcg/day devicesI Sivin, J Stern, J Diaz, et al.Pageof 1