All three of these studies were published in the latest issue of the Environmental Health Perspectives Journal.

1) Prenatal Exposure to Organophosphates, Paraoxonase 1, and Cognitive Development in Childhood.
2) 7-Year Neurodevelopmental Scores and Prenatal Exposure to Chlorpyrifos, a Common Agricultural Pesticide.
3) Prenatal Exposure to Organophosphate Pesticides and IQ in 7-Year Old Children.
If you're not able to go 100% organic, be sure to look at the Environmental Working Group's Shopper's Guide and at least eat the "dirty dozen" organic!