air pollution

US researchers analyzed nine countries,tn pas cher, more than 300 million newborns birth weight found that pregnant women living in areas of severe air pollution easy birth weight less than 2.5 kg of low birth weight children. The results are published in the 6th edition of the American "Environmental Health Perspectives" magazine.
 
There is an association between the two
 
This study is the largest of its kind of a,,hogan outlet, Tracy Angeles, San Francisco professor of obstetrics and gynecology and reproductive health science, University of California? Jennifer Woodruff and disease prevention and control center? Parker presided.
 
The researchers assessed the levels of particulate air pollution in Seoul, Atlanta,usually children generally sleep a few hours, Vancouver,nike tn prezzo, Canada, nine countries 14 regions. Particle pollution sources include vehicle exhaust, coal-fired power plants and dust. These areas were then collected more than 3 million full-term birth weight data newborns.
 
The results showed that the higher the degree of air pollution particles, the higher the chances of pregnant women gave birth to low birth weight children. Particles per cubic meter of air pollutants increase of 10 micrograms, 8.9 g birth weight reduction, your chances of becoming children of low birth weight increased by 3%.
 
When pointed out that low birth weight children born weighing less than 2.5 kg baby. Previous studies showed that low birth weight associated with a number of serious health problems, including post-partum is not perfect, mortality, heart and respiratory diseases,abercrombie pas cher, and behavioral problems.
 
Uncertain causality
 
Fun Science Site on the 6th US Woodruff quoted as saying that the concentration of particles in the 14 regions studied 10 micrograms to 70 micrograms per cubic meter,abercrombie homme,, the majority live in the world of particle concentration in the air is in this range.
 
Woodruff said: "This study makes us more confident that air pollution does affect birth weight."
 
Previous research has also assess the relationship between exposure to air pollution with a series of adverse pregnancy outcomes, including low birth weight, premature birth,,requin air max, stillbirth,hogan outlet, congenital malformations, the mother during pregnancy,, the results are not consistent. The results show some outdoor air pollution and fetal development are closely related,hogan 2014, while others show no correlation between the two.
 
However,louboutin,, in this study the researchers did not consider the mother's socioeconomic status, the mother may be relevant factors such as smoking, and therefore can not determine causality air pollution levels and birth weight.
 
Pregnant women should reduce exposure
 
No one knows exactly how air pollution affects fetal weight. Some researchers believe that air pollution may affect the fetus and placenta connection, thus affecting the absorption of nutrients the fetus. In addition,Peninsula Metropolis Daily August 4,nike tn pas cher, air pollution may cause discomfort for pregnant women and indirectly affect the fetus.
 
University of North Carolina,hogan scarpe,, Virginia? Guidry specializes effects of air pollution on children's respiratory system. She said, unsure reduce exposure to air pollution can affect the fetus according to the study, but "a number of studies have shown that air pollution adverse health, it is best to minimize exposure."
 
US Environmental Protection Agency has suggested that in areas with serious air pollution and time,louis vuitton sito ufficiale, should avoid strenuous exercise outdoors in order to reduce exposure to particulate air pollution.
 
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(Original title: air pollution, heavy infant birth weight)