Dr. Elizabeth Hatch is a Professor of Epidemiology at the Boston University School of Public Health, where she has taught cancer epidemiology for the last 15 years. Her research interests are focused on prenatal and childhood exposures in relation to long-term health outcomes, especially hormonally-related cancers, reproductive outcomes, and obesity. She has conducted research on several cancer sites including brain cancer, childhood leukemia, and breast and cervical cancer. Prior to joining the faculty at BU in 2000, she was an investigator at the National Cancer Institute, where she led a large cohort study on the health risks of exposure to the synthetic hormone, diethylstilbestrol (DES) among women exposed during pregnancy and their offspring exposed in utero. She continues her involvement with the DES study as a co-investigator of the BU DES study site, where 2nd and 3rd generation offspring are being followed for cancer and other conditions. She is also PI of an NICHD funded study that uses internet-based methods to recruit and follow pregnancy planners to evaluate factors related to fertility and pregnancy outcomes.