Reduce your exposure to air pollution
“Perhaps the most convincing and consistent environmental association with autism risk to date is pregnancy exposure to air pollution,” says Dr. Fallin. Multiple studies have shown this connection: One by researchers at the Harvard School of Public Health found that the risk doubled for children born to women exposed to high levels of pollution, particularly in the third trimester. The higher the levels of exposure, the greater the risk. However, that’s just part of the story. “The challenge has become understanding what component of air pollution may be relevant, as this implicates hundreds of chemicals from multiple sources,” explains Dr. Fallin. In general, the American Lung Association recommends several ways to protect yourself from air pollution: for instance, fill your gas tank up after dark, exercise away from highly-trafficked areas and, when pollution levels are high, take your workout indoors. You can check out your daily air quality levels at www.airnow.gov.