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Currently available means for early detection of ovarian cancer have not proven generally effective, so risk-reduction strategies remain the most appropriate way to decrease mortality from this lethal malignancy. In a prospective analysis of pooled data from 149,700 participants in the Nurses’ Health Study (NHS) and NHS II cohorts, investigators evaluated the association between breast-feeding and ovarian cancer risk.
The proportion of respondents who reported that they had ever breast-fed increased from 64% in 1986 to 84% in 1997. The median duration of breast-feeding also increased during this period from 5 to 15 months. Having ever breast-fed was associated with a reduction in ovarian cancer risk that did not achieve statistical significa…