Andrology is the branch of medical science that deals with the male reproductive health and urological problems. It is the counterpart of gynaecology, which deals exclusively with the female reproductive and urological health. Andrology specializes in treating male fertility and sexual issues. This speciality involves the treatment of physical conditions affecting the genitalia, as well as injuries and diseases that can affect fertility or sexual function. It is also involved in harvesting sperm for in-vitro fertilization and performing vasectomies also takes place within this field. This book traces the progress of this field and highlights some of its key concepts and applications. The various sub-fields of andrology, along with the technological progress that have future implications, are glanced at herein. This book will help the readers in keeping pace with the rapid changes in this field.