The fountain of youth or where is the estrogen coming from.
D004967:Estrogens / Q000378:metabolism*; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D018309:Neoplasms, Gonadal Tissue / Q000175:diagnosis* / Q000378:metabolism; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000378:metabolism
D004967:Estrogens