A comparative investigation of contraceptive reliability, cycle control and tolerance of two monophasic oral contraceptives containing either drospirenone or desogestrel.

Abstract
To assess the contraceptive reliability, cycle control and tolerance of a new monophasic oral contraceptive (Yasmin) containing 30 microg ethinylestradiol and 3 mg drospirenone and compare it with a preparation containing an equal dose of ethinylestradiol combined with 150 microg desogestrel (Marvelon).

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