University of California Davis – Researchers have found that pregnant women who live in agricultural areas where pesticides have been used have a 60 percent higher risk of giving birth to children with autism or other developmental delays.
The study looked at three classes of common pesticides: organophosphates, pyrethroids and carbamates. All three were found to have an association with autism spectrum disorders or developmental delays, Newsweek reports.
Lead study author Janie F. Shelton said in a press release:
“While we still must investigate whether certain sub-groups are more vulnerable to exposures to these compounds than others, the message is very clear: Women who are pregnant should take special care to avoid contact with agricultural chemicals whenever possible.”
However avoiding exposure to pesticides in some areas of California may be difficult as California now produces more agricultural products than anywhere else in the country.
The greatest portion of pesticides are applied in Central Valley. In Sacramento County, according to the California Department of Education, the number of individuals with autism has risen sevenfold since 2000.
Dr. Irva Hertz-Picciotto, an author of the study said:
“This is actually the third study that shows some link with the organophosphates and autism risks,”
Researchers were able to conduct the study because fortunately in California pesticide applicators are required to report where and what they are spraying.
The original article by Zoë Schlanger on the Newsweek website can be read here
A more indepth analysis of these findings by our research analyst Paul Whiteley Ph.D. can be read later today here