According to BMJ, a group of researchers from various California schools used a population-based case-control study to analyze links between autism and early exposure to ambient pesticides. To do so, the researchers studied birth data from 1998-2010 in California main agricultural region, Central Valley.
The records at the California Department of Development Services identified 2,961 people with autism spectrum disorder. Data from California state mandated Pesticide Use Reporting was then combined with a geographic information system tool to roughly estimate both parental and infant exposure to pesticides.
Researchers found the risk of autism was linked with various pesticides, such as glyphosate, diazinon, chlorpyrifos, malathion, avermectin, and permethrin. The findings suggest that risk increases when a fetus is exposed to ambient pesticides within 2000 m of their mother’s residence while she is pregnant.