A common pesticide may quietly alter a child’s brain development before birth, with effects lasting into adolescence. Credit: Shutterstock A recent study has identified a concerning connection between prenatal exposure to chlorpyrifos (CPF), a common insecticide, and lasting changes in brain structure as well as reduced motor function in children and adolescents. These findings, published in the journal JAMA Neurology , offer the first evidence of widespread, enduring impacts on the brain's