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A prospective, randomized, cross-over, single-blind, placebo-controlled study to assess the pharmacodynamic effects, pharmacokinetics and safety and tolerability of one dose of 30 mg ulipristal acetate (UPA) followed by the administration of 20 days of 75 µg desogestrel (DSG)

The aim of the present study is to assess the contraceptive potential of the association of UPA 30 mg single dose and desogestrel 75 micrograms for 20 days. The study will also assess the potential possible interaction, (in terms of ovarian activity…