Jorma Toppari, MD, PhD, is the Professor and Chairman of Physiology in University of Turku and the Chief Physician of Pediatric Endocrinology in Turku University Hospital, Turku, Finland. He is also an adjunct Professor in University of Copenhagen, Denmark. He has served as a chief editor of International Journal of Andrology 2001-2009, and as an editor in several journals. He is the president of the European Academy of Andrology and Finnish Endocrine Society. He has published more than 200 peer-reviewed articles on testicular development and function. He was the first author in the seminal review on Male reproductive health and environmental xenoestrogens, published in Environmental Health Perspectives 1996. Recently he was the leader of the writing team on WHO document Possible early effects of endocrine disrupters on child health (WHO 2012), and contributed to the upcoming WHO State of Science of Endocrine Disrupters document.