Babies exposed to air pollution in the womb are more likely to have autism than those whose mothers spend pregnancy in clean air, according to a new study.
In the largest study of its kind, UCLA researchers compared levels of air pollutants, mostly related to vehicle traffic, during pregnancy gestation periods of 7,603 children with autism and 75,635 children without autism, born from 1995 to 2006 in Los Angeles. The study was published March 1 in Environmental Health Perspectives, a peer-reviewed journal published by the National Institute of Environmental Health Sciences.
Babies at the 75th percentile of exposure to toxins had 8 percent to 10 percent higher risk of autism than babies at the bottom 25th percentile, the study said. Ozone and fine particulates had the strongest association with autism.
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