A new survey of 32 studies of women with breast cancer has found a possible link between breast cancer risk and birth size. Birth length in particular showed the strongest link with breast cancer risk, with women who were born longer than the average baby developing a higher risk of breast cancer later in life. Higher birth weight also showed a link to breast cancer risk. The link between birth size and breast cancer, of course, is small when compared to other risk factors (like diet and the ingestion of hormones). [Reuters]