Letters Section Editor: Robert M. Golub, MD, Senior Editor.
To the Editor: Dr Cnattingius and colleagues1 describe a positive association between placental weight and maternal risk of breast cancer. However, they did not specifically address how placental size affects the risk of breast cancer compared with nulliparous women. In the absence of this information, it is difficult to know how to use the results of this study in counseling patients.
Murray RS. Placental Weight and Maternal Risk of Breast Cancer. JAMA. 2006;295(10):1124–1125. doi:10.1001/jama.295.10.1124-c
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