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Common Chemicals May Delay Pregnancy
Date:1/29/2009

Use of PFOS, PFOA as additives is being phased out, researchers note

THURSDAY, Jan. 29 (HealthDay News) -- Chemicals known as perfluorinated chemicals, which are pervasive in food packaging, pesticides, clothing, upholstery, carpets and personal care products, may delay pregnancy, a new study suggests.

These chemicals are being phased out in the United States because of their toxic effects, and are expected to be completely gone by 2010. However, they remain in the environment and in the body for decades, and have been linked to developmental problems.

"These widespread chemicals apparently lower the fertility in couples trying to get pregnant," said lead researcher Dr. Jorn Olsen, chairman of the Department of Epidemiology at UCLA's School of Public Health.

Danish women in the study who had with high levels of perfluorooctanoate (PFOA) and perfluorooctane sulfonate (PFOS) took longer to get pregnant, Olsen said.

"If this finding can be replicated, one would have to look for other chemicals to replace these," he said.

The report is published in the Jan. 29 online edition of Human Reproduction. And it follows on the heels of a report linking another common plastic chemical, bisphenol A (BPA), to developmental problems in fetuses and infants.

For the study, Olsen's team collected data on 1,240 women who participated in the Danish National Birth Cohort. The researchers took blood samples from the women and interviewed them on how long it took them to become pregnant.

The researchers found that blood levels of PFOS ranged from 6.4 nanograms per milliliter (ng/ml) to 106.7 ng/ml. For PFOA, levels ranged from 1 ng/ml to 41.5 ng/ml.

Olsen's group then divided the women into four groups, depending on how much of the chemicals was in their blood.

Women in the three groups with the highest levels of PFOS took from 70 percent to 134 percent longer to get pre
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