The prevention of postmenopausal osteoporosis.
D002118:Calcium / Q000502:physiology / Q000627:therapeutic use; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008593:Menopause; D010024:Osteoporosis / Q000209:etiology / Q000517:prevention & control*
D004967:Estrogens; D002118:Calcium