Ann Aschengrau is Professor of Epidemiology at BU School of Public Health. She received a BA in Biology from Northeastern University and MSc and DSc degrees in epidemiology from Harvard T.H. Chan School of Public Health. She has been an environmental and reproductive epidemiologist for the past 30 years and has focused much of her research in this area. She is currently the Principal Investigator of a study on the risk of substance use following early life exposure to environmental and social stressors. She has also taught courses in epidemiology including “Introduction to Epidemiology,” “Reproductive Epidemiology” and “Environmental Epidemiology” and is the co-author of the textbook “Essentials of Epidemiology in Public Health,” now in its 4th edition.