The study, published Oct. 6, 2009 in the journal Environmental Health Perspectives, is the first to examine if there is a link between prenatal bisphenol A (BPA) exposure and behavior problems in children. Results suggest that if a woman is exposed to BPA early in her pregnancy, development of the baby’s nervous system might be adversely affected.
BPA is commonly used in the production of polycarbonate plastics and epoxy resins that can be found, for example, in some types of plastic bottles, canned food linings, water supply pipes and medical tubing. About 93 percent of people in the United States have detectible levels of BPA in their urine, according to the Centers for Disease Control and Prevention.
Researchers found that daughters of women who had higher concentrations of BPA in their urine samples during pregnancy were more likely to have aggressive and hyperactive behaviors than children of women with lower BPA levels, especially if higher exposure was seen earlier in pregnancy.
“In other words, girls whose mothers had higher BPA exposure were more likely to act like boys than girls whose mothers had lower BPA levels, especially if the exposure was seen earlier in pregnancy,” said the study’s lead author Joe Braun, a doctoral student in epidemiology at the UNC Gillings School of Global Public Health. “Boys’ behavior did not seem to be affected, although there was some evidence of increased internalizing scores among BPA-exposed boys.”
Researchers do not know why girls seem to be affected by the exposure more or differently than boys.
BPA has been used in products for decades, and concerns about its safety have been growing in recent years, Braun said. Previous studies in mice have shown that the offspring of mothers with high BPA exposure during pregnancy were more aggressive than offspring not exposed to high prenatal levels of BPA.
“We wanted to know if there was a risk in humans for neurodevelopment problems,” he said. “Study results indicate that exposure to BPA early in the pregnancy seems to be the most critical issue. The most damaging exposure might happen before a woman even knows she’s pregnant.”
Braun worked with researchers at the Cincinnati Children’s Hospital Medical Center, the University of Cincinnati, the Centers for Disease Control and Prevention, and Simon Fraser University in Vancouver, British Columbia.
For the study, urine samples were taken from 249 pregnant women in Cincinnati, Ohio, at 16 weeks and 26 weeks of pregnancy, and again at birth. BPA concentrations in the samples were measured. Then, when the children were 2 years old, behavior problems were assessed, using the Behavioral Assessment System for Children-2 (BASC-2).
“Many government agencies and consumers in the U.S., Canada and around the world have expressed concerns about BPA exposure, especially in children,” said Dr. Bruce Lanphear, professor of children’s environmental health in the Faculty of Health Sciences at Simon Fraser University and the study’s senior author. “Canada has banned BPA in baby bottles and other baby products, but that might not be sufficient to protect children. Although this is the first study of its kind, it suggests that we may also need to reduce exposures during pregnancy.”
The study was funded in part by the National Institute of Environmental Health Sciences and the U.S. Environmental Protection Agency.
For more information on the study, visit: www.ehponline.org.
Note: Braun can be reached at (919) 951-8519 or email@example.com. Lanphear can be reached at (778) 387-3939 or firstname.lastname@example.org.
Ramona DuBose | Newswise Science News
Diagnoses: When Are Several Opinions Better Than One?
19.07.2016 | Max-Planck-Institut für Bildungsforschung
High in calories and low in nutrients when adolescents share pictures of food online
07.04.2016 | University of Gothenburg
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences