Headache and sex hormone therapy.
D000328:Adult; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004997:Ethinyl Estradiol / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007044:Hysterectomy; D008875:Middle Aged; D008881:Migraine Disorders / Q000139:chemically induced*; D009644:Norgestrel / Q000009:adverse effects*
D009644:Norgestrel; D004997:Ethinyl Estradiol