Navigation Links
Flame-Retardant Chemical Linked to Conception Problems
Date:1/26/2010

High levels of PBDEs can reduce chance of pregnancy by up to 50%, researchers say,,

TUESDAY, Jan. 26 (HealthDay News) -- Women who are exposed to a common chemical that's used as a flame retardant may take longer to become pregnant, a new study finds.

The chemicals, called PBDEs (polybrominated diphenyl ethers), are found in a variety of products including foam furniture, electronics, fabrics, carpets, plastics and other common household items and have been linked to a variety of health problems, researchers say.

"Women with high PBDE levels were 30 to 50 percent less likely to become pregnant in any given month than women with lower levels," said lead researcher Kim Harley, an adjunct assistant professor of maternal and child health and associate director of the Center for Children's Environmental Health Research at the University of California Berkeley School of Public Health.

"Although these chemicals are being phased out of new products, they will be around for a long time," she added.

The report is published in the Jan. 26 issue of Environmental Health Perspectives.

For the study, Harley's team measured PBDE levels in blood samples from 223 pregnant women who took part in a study at the Center for the Health Assessment of Mothers and Children of Salinas, which looked at environmental exposures and reproduction.

Among these women, concentrations of PBDEs were slightly lower than in the general U.S. population. The researchers speculate that this may be due to the fact that many of the women grew up in Mexico where exposure to PBDEs are limited.

Limiting their analysis to women who were trying to become pregnant, Harley's group found that women with high levels of PBDE in their blood were half as likely to become pregnant in any given month. In fact, for every tenfold increase in blood levels of PBDEs, the odds of becoming pregnant were reduced 30 percent.

These findings held even after the researchers took into account exposure to pesticides, irregular menstrual cycles, frequency of intercourse, weight, use of birth control pills in the year before conception, smoking, and alcohol and caffeine use.

The reasons for the chemical's effect on pregnancy isn't clear, Harley said. Harley noted that very little research has been done in humans. However, animal studies have found a variety of health effects from these chemicals including pregnancy problems, she said.

These animal studies have found that PBDEs can harm neurodevelopment, lower thyroid hormones and change levels of sex hormones. High or low thyroid hormone levels can disrupt normal menstrual patterns in humans, Harley noted.

PBDEs became common after the 1970s with new fire-safety standards in the United States. Studies have found widespread PBDE dust in homes. These chemicals are known to leach into the environment and accumulate in human fat cells, Harley said.

Studies have found that 97 percent of Americans have detectable levels of PBDEs in their blood. These levels are 20 times higher than found in Europeans. According to Harley, Californians have some of the highest exposures to these chemicals due to strict fire laws in that state.

Harley said the best way to reduce your exposure to PBDEs is to reduce your exposure to house dust, by using a wet mop and vacuuming with a filtered vacuum cleaner and washing your hands often.

While there are some 209 different formulations of PBDEs, only three -- pentaBDE, octaBDE and decaBDE -- have been developed for commercial use as flame retardants. PentaBDE and octaBDE have both been banned in several states, including California, but are still in products made before 2004.

Last month, the U.S. Environmental Protection Agency announced that three major manufacturers of decaBDE will phase out this product by 2013.

Although PBDEs are being phased out, other chemicals are taking their place. "We know even less about the newer flame-retardant chemicals that are coming out," Harley said. "There has been even less research on these chemicals."

Dr. George Attia, an associate professor of reproductive endocrinology and infertility at the University of Miami Miller School of Medicine, said that "there are a lot of other factors that would affect the fertility of these women, not only PBDEs."

Attia thinks these findings need to be proven in prospective studies that can control for the complicated set of factors that affect fertility.

However, Attia does not exclude the possibility these chemicals affect fertility.

"Common sense says avoid this substance, but we don't have data to substantiate that, but common sense will tell you be careful and be aware that there is something out there about this stuff," he said.

The American Chemistry Council, which represents chemical manufacturers, declined to comment on the findings.

More information

For more information on PBDEs, visit the U.S. Environmental Protection Agency.



SOURCES: Kim Harley, Ph.D., adjunct assistant professor, maternal and child health, and associate director, Center for Children's Environmental Health Research, University of California Berkeley School of Public Health; George Attia, M.D., associate professor, reproductive endocrinology and infertility, University of Miami Miller School of Medicine; Jan. 26, 2010, Environmental Health Perspectives


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Prenatal exposure to flame-retardant compounds affects neurodevelopment of young children
2. Poop dermatitis linked to fashionable toilet seats, harsh chemicals
3. Stain repellent chemical linked to thyroid disease in adults
4. FDAs BPA Announcement an About Face on the Toxic Chemical
5. Chemical BPA Linked to Heart Disease Risk
6. Breast Growth in Boys Might Be Linked to Plastics Chemical
7. When Will FDA Speak Out on Toxic Plastics Chemical BPA?
8. New Board Gains Control of U.S. Shanghai Chemical Corporation
9. Green tea chemical combined with another may hold promise for treatment of brain disorders
10. Pre-Polluted Babies: Congress Must Act to Protect Infants, Moms from Toxic Plastics Chemical BPA
11. Could Plastics Chemicals Feminize Boys Play?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... PawPaws brand pet supplements owned ... developed to enhance the health of felines. The formula is all-natural and is made ... in the PawPaws Cat Kidney Support Supplement Soft Chews are Astragalus Root ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library ... City Observer , brings up a new, often overlooked aspect of head lice: the parasite’s ... for fumigation is not a common occurrence, but a necessary one in the event that ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... On Friday, ... presented a Bronze Wellness at Work award to iHire in recognition of their exemplary ... part of the 7th annual Maryland Workplace Health & Wellness Symposium at the BWI ...
(Date:6/24/2016)... CA (PRWEB) , ... June 24, 2016 , ... Marcy was in a crisis. Her ... would lash out at his family verbally and physically. , “When something upset him, he ... he would use it. He would throw rocks at my other children and say he ...
(Date:6/24/2016)... NY (PRWEB) , ... June 24, 2016 , ... Topical BioMedics, Inc, makers of Topricin ... companies that call for a minimum wage raise to $12 an hour by 2020 and ... This will restore the lost value of the minimum wage, assure the wage floor does ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 24, 2016 The Academy of Managed Care ... that would allow biopharmaceutical companies to more easily ... make formulary and coverage decisions, a move that addresses ... medicines. The recommendations address restrictions in the ... the drug label, a prohibition that hinders decision makers ...
(Date:6/24/2016)... -- According to a new market research ... Safety Pen Needles), Needle Length (4mm, 5mm, 6mm, 8mm, ... Purchase (Retail, Non-Retail) - Trends & Global Forecasts to ... for the forecast period of 2016 to 2021. This ... 2021 from USD 1.65 Billion in 2016, growing at ...
(Date:6/23/2016)... -- MedSource announced today that it has selected Datatrial,s ... choice.  This latest decision demonstrates MedSource,s commitment to ... by offering a state-of-the-art electronic data capture (EDC) ... the EDC platform of choice in exchange for ... long been a preferred EDC platform by our ...
Breaking Medicine Technology: