title: Chronic anovulation may increase postmenopausal breast cancer risk.
mesh_terms: D000368:Aged; D000858:Anovulation / Q000150:complications*; D001943:Breast Neoplasms / Q000209:etiology*; D004967:Estrogens / Q000009:adverse effects; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D012306:Risk
chemical_list: D004967:Estrogens