Tuesday, August 2, 2011

Potential birth defects due to pollutants

Women who smoke during pregnancy appear to coal and pesticides has achieved four times more likely to give birth in a nervous tube defects (NTD), it is based on a study done in China. The researchers studied on 80 newborns and aborted fetuses with defects of the brain and spinal cord defects in the placenta and they clearly have a much higher amount of certain chemicals than babies without birth defects placenta.

Birth defects
has long been associated with folic acid deficiency, maternal obesity and diabetes. Environment pollution has also been suspected as a cause of others, but as yet there is very little direct evidence to show that relationship.

In research in China, researchers detected a polisiklik aromatic hydrocarbons (PAH), high levels of inhaling
smoke from burning coal, and synthetic pesticides such as DDT, hexachlorocyclohexane (HCH) and endosulfan in the placenta, infants with NTDs. In addition to the nutrients and oxygen, pollutants can easily pass through the placenta barier, this is also potentially interfere with embryonic growth, as reported by researcher Dr. Zhu Tong at the State Key Joint Laboratory for Environmental Simulation and Pollution Control in Beijing University.

These research findings published in the Journal of the National Academy of Sciences Proceding online in July 2011. Dr. Zhu and colleagues involving pregnant women in four rural districts in the northern province of Shanxi, where NTD occurred in 14 of every 1000 infants (much higher than the national average). They analyze the placenta from 80 infants or fetuses with NTD diaborsi and compare it with the placenta from the 50 infants without such defects.

The researchers found that women who have chemical PAH (from burning coal) in the placenta is higher than an average, have 4.5 times more likely to have birth defects, while those with higher rates of pesticides from the distribution -distribution is approximately three times more likely to have babies with defects.

Adopted from www.panda.org


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