Published in Women's Health Weekly, October 26th, 1998
L. Titus-Ernstoff, of the Dartmouth-Hitchcock Medical Center in New Hampshire, and colleagues examined the relationship between a woman's menstrual cycle and her risk for breast cancer ("Menstrual Factors in Relation to Breast Cancer Risk," Cancer Epidemiol Biomarkers Prev, September 1998;7(9):783-789).
Titus-Ernstoff et al. compared 6,888 women with breast cancer to 9,529 controls. Additionally, since "exogenous hormones influence menstrual cycle patterns," the researchers also studied a subgroup of women with no history of hormone replacement therapy or oral contraceptive use.
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