Side effects of the pill.
D000568:Amenorrhea / Q000139:chemically induced*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006261:Headache / Q000139:chemically induced*; D006801:Humans; D007989:Libido / Q000187:drug effects*
D003276:Contraceptives, Oral