Therapeutic efficacy test protocol - WHO

Use monophasic pills because brand names are more expensive. Eliminate the hormone-free (placebo) interval ... Can be initiated on same day as visit at any time during menstrual cycle following negative pregnancy test. Labeled for 28 days of use, but can be used for up to 35 days. ... Thrombosis risk or estrogen sensitivity. 20 mcg estrogen ... ................
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