Prenatal maternal stress in relation to the effects of prenatal lead exposure on toddler cognitive development

To evaluate the effects of maternal lead exposure during pregnancy on toddler cognitive development and the potential effect modification by maternal stress. We conducted a prospective birth-cohort study in Shanghai from 2010 to 2012 and investigated 225 mother-infant pairs. The mothers were recruited in mid-to-late pregnancy and children were followed up until 24–36 months old. A self-administered Symptom Checklist-90-Revised Scale (SCL-90-R)...