Amenorrhea following oral contraceptives.
D000568:Amenorrhea / Q000139:chemically induced* / Q000188:drug therapy; D003276:Contraceptives, Oral / Q000008:administration & dosage / Q000009:adverse effects*; D005260:Female; D006801:Humans; D010298:Parity; D011247:Pregnancy; D011372:Progestins / Q000627:therapeutic use
D003276:Contraceptives, Oral; D011372:Progestins