The investigation of oligomenorrhoea and secondary amenorrhoea.
D000293:Adolescent; D000328:Adult; D000568:Amenorrhea / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology; D003937:Diagnosis, Differential; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008599:Menstruation Disturbances / Q000175:diagnosis* / Q000188:drug therapy / Q000209:etiology; D011085:Polycystic Ovary Syndrome / Q000175:diagnosis; D011372:Progestins / Q000627:therapeutic use
D004967:Estrogens; D011372:Progestins