No abstract available
MeSH terms
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Adolescent
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Adult
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Cervix Mucus / drug effects
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Contraceptives, Oral / pharmacology*
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Contraceptives, Oral, Combined / pharmacology*
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Dose-Response Relationship, Drug
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Endometrium / drug effects
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Ethinyl Estradiol
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Female
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Humans
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Norethindrone / pharmacology
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Ovulation / drug effects*
Substances
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Contraceptives, Oral
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Contraceptives, Oral, Combined
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Ethinyl Estradiol
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Norethindrone