This project is a follow-up study to our fetal/infant neuroimaging project and seeks to examine the cognitive and behavioral development of children. Building on data collected at previous fetal/infant PINC study visits, this project aims to evaluate prenatal factors as predictors of later neurobehavioral outcomes, and assess how these together with environmental (e.g., toxicant exposure) and genetic factors shape brain and behavior. Participants in our study are toddlers and young children (ages 7 mo. and 3 years) recruited from our fetal MRI visit cohort. We seek to establish a link between prenatal factors (e.g., fetal brain development, maternal stress) and both environmental and biological factors in children’s early years that impact their health and growth. Our approach is to use behavioral assessments and biological sampling (cortisol, blood) in conjunction with previously gathered functional (resting-state) Magnetic Resonance Imaging (MRI) data to model healthy and atypical neurobehavioral development in early life.