Prolonged oral contraception and its after-effects.
D000568:Amenorrhea / Q000139:chemically induced; D003276:Contraceptives, Oral / Q000008:administration & dosage / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000139:chemically induced
D003276:Contraceptives, Oral