Letter: Fertility-rates after oral contraceptives.
D000818:Animals; D003276:Contraceptives, Oral / Q000494:pharmacology*; D005260:Female; D005298:Fertility / Q000187:drug effects*; D006801:Humans; D011323:Primates / Q000502:physiology; D012621:Seasons
D003276:Contraceptives, Oral