Women Exposed To High Levels of Pollutant PCB More Likely To Give Birth To Female Children

Women exposed to high levels of PCBs (polychlorinated biphenyls -- a group of banned environmental pollutants) are less likely to give birth to male children. A new study found that among women from the San Francisco Bay Area, those exposed to higher levels of PCBs during the 50s and 60s, were significantly more likely to give birth to female children.