This book presents the latest insights into all the critical aspects of Klinefelter¿s Syndrome, in order to promote a more homogeneous a medical approach to this condition, leading to better and more ¿evidence-based¿ support, and improving patient satisfaction. It offers physicians and all health professionals involved in treating these patients (andrologists, pediatricians, endocrinologists, psychologists) a comprehensive overview and a useful tool for their daily clinical practice.