Dr. Chavarro’s research focuses on understanding how nutritional, lifestyle and metabolic factors impact human reproduction and reproductive milestones throughout the life course, and how these events, in turn, impact other aspects of health. Over the fifteen years, this broad interest has focused primarily on understanding how nutrition impacts human fertility and health during pregnancy, and has expanded recently to also include research related to developmental origins of health and disease, and women’s health during the menopausal transition. He is Principal Investigator of the Nurses’ Health Study 3, an ongoing prospective cohort study that follows more than 50,000 women. He also leads the nutritional component of the EARTH Study – a prospective cohort of couples undergoing infertility treatment at the Massachusetts General Hospital – and of the Young Men’s Studies consortium, which studies how the environment influences testicular function by studying young men in Denmark, Spain and the United States. His work has resulted in more than 400 peer-reviewed publications and has been recognized by numerous awards including the 2014 Ira and Ester Rosenwaks New Investigator Award by the American Society for Reproductive Medicine. He has served as standing member and Chairperson of the Pregnancy and Neonatology study section for the US National Institutes of Health and as a member of the Research Program Review Panel for the World Health Organization’s Human Reproduction Programme.