Adverse experiences during sensitive developmental windows—the time of conception, late pregnancy, infancy, and early childhood—can have long-lasting effects on children’s health. The purpose of this research is to better understand the effects of physical, chemical, and biological exposures, social and behavioral factors, and the natural and built environments on child health and development. This program is focused on five different health outcomes: pre-, peri-, and postnatal outcomes; obesity and its consequences; upper and lower airway conditions; domains of neurodevelopment; and positive attributes of healthy growth.