Maternal Obesity and Offspring Neurodevelopment

Inclusion Criteria: * Singleton pregnancy * 11-13 weeks of gestation -≥18 years of age. Exclusion Criteria: * BMI measured at first study visit \<18.5 or between 26-29 or \>50 * hypertension, diabetes, or other preexisting medical conditions known or suspect (by the research team) to influence fetal growth; * family history of psychological or neurogenetic disorders as determined by the research team that may increase the risk of adverse neurodevelopmental outcomes in offspring * medications known to influence fetal growth * recreational drugs, nicotine or tobacco (including smokeless) use or alcohol use while pregnant * medical conditions developed during pregnancy (e.g. gestational diabetes, preeclampsia) known or suspected by the research team to influence fetal growth * infants born preterm (\<37 weeks of gestation), with congenital defects, intrauterine growth restriction, small for gestational age, macrosomia, hypoglycemia, low Apgar score (\<7), or any other medical complications at birth suspected affecting development