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PCBs may impair fertility

Study finds reduced embryo implantation in women with high levels of banned chemical

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5:49pm, February 28, 2011

PCB exposure may interfere with a woman’s ability to get pregnant, a new study of women undergoing in vitro fertilization suggests. The study of 765 women found that those whose blood contained the highest levels of a particular form of polychlorinated biphenyl — one known as PCB 153 — were 41 percent less likely to give birth than women with the lowest levels.

One contributing factor: Fertilized eggs were half as likely to implant in women if blood concentrations of PCB-153 fell in the top 25 percent of those measured among all participants. The study appeared online February 24 in Environmental Health Perspectives.

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