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Study: BPA Exposure in Womb Linked to Kids' Behavior Problems

But Researchers Caution Study Only Shows Association, Not Cause and Effect
By
WebMD Health News
Reviewed by Laura J. Martin, MD

Oct. 24, 2011 -- Preschoolers exposed to higher levels of bisphenol A (BPA) in the womb may have more anxiety and depression and have worse self-control than those exposed to lower levels of the chemical before birth, a new study shows.

The chemical is found in a wide array of consumer products, including plastic bottles, food packaging, dental sealants, and the heat-activated paper that's used to print cash register receipts.

A spokesman for an industry group says the new study had flaws in its design, and that other studies have found BPA to be safe.

The chemical structure of BPA is similar to the hormone estrogen. That raises concerns that constant exposure could have biological effects, particularly for developing babies and young children.

Studies of animals exposed to BPA have found changes in the brain, behavior, and abnormal development of reproductive organs. So far, there has been less evidence of health effects in humans.

The new study is published in Pediatrics. It is one of the first to show that BPA exposure in the womb may be linked to behavioral effects in young children.

Researchers caution though that their study was only able to show associations between BPA and behavior. It did not prove cause and effect.

Industry Responds

In an emailed statement, Steven G. Hentges, PhD, of the American Chemistry Council's Polycarbonate/BPA Global Group, says it is unlikely that BPA caused the behavioral effects documented in the study. "The study released in Pediatrics has significant shortcomings in study design and the conclusions are of unknown relevance to public health. Furthermore, regulators from Europe to Japan to the US have recently reviewed hundreds of studies on BPA and repeatedly supported the continued safe use of BPA."

Childhood Behavior and BPA

For the study, researchers followed 244 mothers and their babies from pregnancy through age 3. They measured BPA levels in three urine samples taken from pregnant women and three samples collected from their kids at yearly study visits.

After the children's third birthday, researchers gave parents two well-regarded psychological tests to evaluate their child's behavior and their capacity for self-control. Parents were not given information about their BPA levels before they rated their child's behavior.

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