Andrology is a decidedly interdisciplinary field in which several specialities participate. Accordingly, this volume is addressed to all concerned with male reproductive health: Andrologists, gynecologists, urologists, internists, endocrinologists, dermatologists, basic researchers. The volume comprises basic science as well as clinical andrology and includes chapters on:Biology of reproduction, testicular function, sperm maturation and fertilization, endocrinology of the male, environmental factors, psychology, senescence, contraception; as well as chapters on the diagnosis and therapy of andrological diseases including: Infertility, hypogonadism, assisted reproduction: ICSI and TESE, therapy with testosterone, erectile dysfunction.