Cycle control with oral contraceptives containing 20 μg of ethinyl estradiol: A multicenter, randomized comparison of levonorgestrel/ethinyl estradiol (100 μg/20 μg) and norethindrone/ethinyl estradiol (1000 μg/20 μg)

Autor: DelConte, Anthony *, Loffer, Frank †, Grubb, Gary S
Zdroj: In Contraception 1999 59(3):187-193
Databáze: ScienceDirect
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