… increased risks of breast cancer in postmenopausal … hormone levels that vary cyclically. We
prospectively evaluated associations between plasma sex hormone levels and breast cancer …

… on hormone levels. Confirmation of an association between hormone levels and breast cancer
in … further support the inclusion of hormone concentrations into prediction models used to …

… literature on exogenous hormones, addresses the issue of endogenous steroid … After
menopause, breast tissue becomes quiescent when circulating sex steroid hormone levels drop to …

… Epidemiological studies have examined breast cancer risk in relation to sex hormone
concentrations measured by different methods: “extraction” immunoassays (with prior purification …

… link between circulating estrogen levels and breast cancer risk for postmenopausal women
… of endogenous hormone levels and breast cancer risk, levels of multiple sex steroids – …

… We assessed whether the associations between hormone levels and risk varied by
menopausal status at diagnosis, age at blood draw, BMI, duration of oral contraceptive use, or …

… reported that endogenous steroid hormone levels are associated … steroid hormone levels
on postmenopausal breast cancer risk overall, and with respect to tumor grade and hormone …

… between endogenous hormone levels and breast cancer risk … varied by stratification by other
breast cancer risk factors, by … circulating steroid hormones in the etiology of breast cancer. …

… results for the associations between hormone levels and breast cancer risk (results not
shown). … Measurements of steroid hormone concentrations are subject to substantial between-…

… Substantial indirect evidence supports a central role for endogenous hormones in breast
cancer development (1). Reproductive factors such as early age at menarche, late age at …