Researchers have just linked prenatal exposure to bisphenol-A – a near-ubiquitous industrial chemical – with subtle, gender-specific alterations in behavior among two year olds. Girls whose mothers had encountered the most BPA early in pregnancy tended to become somewhat more aggressive than normal, boys became more anxious and withdrawn.
This is the first study to link human behavioral impacts with BPA, a common ingredient in hard polycarbonate plastics and the resins used in food-can linings. Emerging data from an unrelated research group points to another especially rich newfound source of BPA to which people unwittingly may be exposed: thermally printed cash-register receipts (see next blog).
At present, there’s no way to know whether the apparent behavioral impact of BPA exposures early in development will persist or disappear, says Bruce Lanphear of Simon Fraser University in Burnaby, British Columbia. But this epidemiologist, an author of the new study, says his worry is that if the kids don’t grow out of these behaviors – and indeed, the changes are expressed widely across a population – they could greatly increase the number of teens at risk for delinquency, say, or for one day needing medical treatment of depression or anxiety.
Further prompting concern that the associations are real, his team points out, are rodent studies showing aggression and hyperactivity in pups prenatally exposed to BPA.
Lanphear
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