PCB Exposure During Pregnancy May Harm Babies’ Immune System
by Jennifer Chait, 02/03/12New research shows that exposure to PCBs may result in some immune consequences for babies. Polychlorinated biphenyls (PCBs) are a group of manufactured organic chemicals and researchers recently found that babies exposed to higher PCB levels during gestation and as newborns were born with a smaller immune organ – the thymus. At 6 months of age these babies still had a smaller organ. By 13 months, differences in immune organ sizes were no longer seen. The thymus is responsible for proper T-cells development and problems with the thymus can result in immune system dysfunction. For a baby, who already has a less efficient immune system, this is a problem. PCB exposure has also been linked to cancer, poor neurological development in children and reproduction problems. Now, what’s unique about this study is that PCBs are banned in the U.S. They’re no longer manufactured or even widely used, so how are mamas and babies being exposed?














































































