Lake Michigan fish consumption as a source of polychlorinated biphenyls in human cord serum, maternal serum, and milk.

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Abstract
Reported consumption of Lake Michigan sport fish was examined in relation to the levels of polychlorinated biphenyls (PCBs) in biological samples provided by a sample of maternity patients. Fish consumption was correlated with PCB levels in maternal serum and milk but not in cord serum. PCB levels in serum increased with age, but were unrelated to social class, parity, or weight. Women who breast fed consumed as much fish as women who did not and their maternal and cord sera PCB levels were similar.