PCBs may impair fertility | Science News



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PCBs may impair fertility

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

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.

In women not undergoing IVF it would be difficult to know when to test for implantation, says

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