About Careers MedBlog Contact us

Thyroid Hormone Levels During Pregnancy may be Altered by Flame Retardant

by Kathy Jones on June 21, 2010 at 9:45 PM
Font : A-A+

 Thyroid Hormone Levels During Pregnancy may be Altered by Flame Retardant

Pregnant women with higher blood levels of a common flame retardant could have altered thyroid hormone levels during pregnancy, a new study has found.

According to the researchers this is the first study, which has sufficient sample size to assess the correlation between PBDE flame-retardants and thyroid function in pregnant women.


PBDEs, or polybrominated diphenyl ethers, are a class of organobromine compounds found in household items such as carpets, textiles, foam furnishings, electronics and plastics etc.

"Normal maternal thyroid hormone levels are essential for normal fetal growth and brain development, so our findings could have significant public health implications. These results suggest that a closer examination between PBDEs and these outcomes is needed," said the study's lead author, Jonathan Chevrier, a University of California, Berkeley researcher in epidemiology and in environmental health sciences.

In the new study, the researchers analysed blood samples of as many as 270 women taken around the end of their second trimester of pregnancy.

The researchers found that a 10-fold increase in each of the PBDE chemicals was associated with decreases in TSH ranging from 10.9 percent to 18.7 percent.

When the five PBDEs were analysed together, a tenfold increase was linked to a 16.8 percent decrease in TSH.

The study did not find major effect of PBDE concentrations on levels of T4.

With one exception- all the women in the study with low TSH levels had normal free T4 levels, which corresponds to the definition of subclinical hyperthyroidism.

The study found that odds of subclinical hyperthyroidism increased 1.9 times for each tenfold increase in PBDE concentrations.

This study was published in the journal Environmental Health Perspectives.

Source: ANI


Recommended Reading

Latest Women Health News

Women! When is the Right Time to Get a Mammogram?
Experts suggest that getting regular mammograms at the age of 40 can help women prevent breast cancer.
 Finding the Best Tool for Assessing Osteoporosis Fracture Risk After Menopause
The commonly used Fracture Risk Assessment Tool (FRAX) is not useful for shared clinical decision-making regarding osteoporosis screening in younger postmenopausal women.
 Pregnancy Complications Linked to Woman's Stroke Risk at Midlife
Researchers hypothesized that adverse pregnancy outcomes (APO) are associated with younger age at first stroke, with a stronger relationship in those with >1 pregnancy with APO.
Escaping the Cycle of Perfection: Redefining Women's Roles!
Women grapple with the risk of mental illnesses as immense challenge of constantly striving for perfection and balancing multiple roles takes a toll.
Breaking the Myth of Animal Product Dependency for Lactating Mothers
Irrespective of dietary preferences, lactating mothers maintain similar concentrations of nutrients in their breast milk, when comparing vegan and omnivorous diets.
View All
This site uses cookies to deliver our services.By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use  Ok, Got it. Close

Thyroid Hormone Levels During Pregnancy may be Altered by Flame Retardant Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests