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The United States: flame retardants affect the health of pregnant women

according to Scientific American, scientists have proved for the first time that banned flame retardants have decreased in the United States with the doubling of chemical substances. The research shows that the corresponding standards for flame retardants in California are not perfect, and the level in women is 65% lower than that three years ago

two flame retardants have been banned in the United States since 2004. However, many experts have been worried about their durability, because they will slowly destroy human tissues, and are widely used in many products, such as sofas that people have used for many years

there is evidence that the content of banned compounds such as polybrominated diphenyl ethers in breast milk doubles every five years. Polybrominated diphenyl ethers (PBDEs) can disturb the thyroid hormones of pregnant women and newborns. Thyroid hormone is an important factor for brain development. Domestic technology still can not produce high-quality products. Prenatal exposure to PBDEs can cause poor concentration and attention, as well as decreased IQ

in the San Francisco Bay Area in 2011 and 2012, researchers tested the blood of 36 women in the second trimester of pregnancy. Their overall PBDEs level was 65% lower than that of pregnant women in 2008 and 2009 measured by differential full bridge

in addition, the decomposition products of some PBDEs were reduced sixfold in the two groups. As far as flame retardants are concerned, scientists do not know what effect their decomposed compounds will have, but some studies have shown that they may also disturb thyroid hormones

over the past decade, these compounds have declined in the human living environment, including room dust. But the decline in the human body is expected to take longer, especially when people are constantly exposed to old furniture

experts expect that the decline of PBDEs will be the same as that of PCBs and other persistent compounds banned in 1978, which will rapidly decline in the human body and continue to maintain a low level

Dr. Arnold Schechter, a professor at the University of Texas School of public health, said: however, at present, we do not know how much PBDEs in the human body can be called a safe amount

the levels of PBDEs in pregnant women in California were still higher than those in other regions. Low income and ethnic minorities appear to have a higher risk of exposure. In addition, California is considered to contain the highest level of PBDEs in the world, mainly due to state flammability standards for furniture

pbdes levels may decline, but new brominated flame retardants have been produced, but the authors of this new study did not test the possible effects of new flame retardants on women

we do not know the impact of changing flame retardants on health. It is planned to build a plastic production plant in the local special economic zone, but few studies have shown that these new chemicals may also disturb hormones. Stepton, an environmental chemist at Duke University

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