title: Noncontraceptive estrogen use and the occurrence of ovarian cancer.
mesh_terms: D000328:Adult; D000368:Aged; D004967:Estrogens / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000139:chemically induced*; D012189:Retrospective Studies
chemical_list: D004967:Estrogens