Dictionaries:
21:7 oral contraceptive program:
Or: 21:7-pill-program , birth-control regimen consisting of 21 daily contraceptive pills containing female sex-hormones (estrogens and/or progesterone) followed by 7 placebo pills (or 7 days without pills) during menstruation .See Also: 21:7 oral contraceptive program, 21:7 pill program
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