Written by respected experts in the field, this book constitutes an innovative resource, combining updated, reliable and comprehensive information with agile consultation in order to provide a streamlined approach to the care of children and adolescents with such disorders.

?Dr. Carlo Foresta is a Full Professor of Endocrinology at the University of Padua, Italy where he is also Director of the Operative Unit Andrology and Medicine of Human Reproduction. Former President of the Italian Society of Andrology and Sexual Medicine (2010-2014), Dr. Foresta is also a Member of the Board of Directors of the Italian Society of Endocrinology. His main research fields are pathophysiology of human reproduction, genetics of human sperm, male infertility, cryptorchidism and testicular tumors, pharmacogenetics of infertility, Klinefelter syndrome, male osteoporosis, metabolic syndrome, pathophysiology of male aging, and endocrine and reproductive disorders in sexually transmitted diseases. Prof. Foresta is the author of 351 original scientific publications in international journals, and of more than 50 books on reproductive medicine, andrology and endocrinology. He serves on the Editorial Board of several international scientific journals.

Dr. Daniele Gianfrilli is a Associate Professor of Endocrinology  at the Department of Experimental Medicine, 'Sapienza' University of Rome. Dr. Gianfrilli is also a Member of the Board of Directors of the Italian Society of Endocrinology. His main research fields are the steroidogenesis pathway and steroid hormones, hypogonadism and testosterone replacement therapy, the phosphodiesterases (PDE) system, primary and secondary prevention in andrology and transition age, testicular tumors and testiculopathy. He is the author of more than 100 journal articles and book chapters.