We are deeply saddened to learn that Bernard Jégou has passed away. He was internationally recognised reproductive biologist, with main interest in the testis function, development and endocrine disrupters. He was the founder and a long -time Director of the excellent, multidisciplinary research group in Rennes, France, with developed several ground-breaking tools to study various aspects of reproductive biology. Bernard was also a member of the Scientific Committee of the European Testis Workshops and organised two of them in St Malo. He was passionate about science and research education, and served on highest scientific councils in France. Bernard was a very special person – serious about science, excellent speaker and disseminator of research, but also caring, funny and charismatic. Everybody who knew Bernard and the whole generation of scientists he trained will miss him.