Jaime Hart, is an associate professor at the Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School and the Department of Environmental Health at the Harvard TH Chan School of Public Health. She is an environmental epidemiologist with a focus in incorporating high quality exposure measures of exposure into ongoing and forming prospective cohort studies. She is the Scientific Director of the Growing Up Today Study (GUTS), and PI of a grant in that cohort to examine the impacts of indoor and outdoor pollution and personal exposures to endocrine disrupting chemicals on semen quality, and is highly involved in expanding the focus of the Nurses’ Health Study 3 to include a substantial environmental component.