Estrogen replacement therapy.
D002118:Calcium / Q000008:administration & dosage; D004997:Ethinyl Estradiol / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008593:Menopause; D010024:Osteoporosis / Q000517:prevention & control*
D004997:Ethinyl Estradiol; D002118:Calcium