Male infertility is a complex disorder where hereditary, epigenetic, and ecological factors, all add to the growth of the phenotype. Recently, there has been a rising anxiety regarding the decline in reproductive fitness, paralleled by a rise in requirement for infertility treatments. This shows a need for a full and comprehensive consideration of normal and unusual testicular function and the ecological influences on the creation and integrity of the male germ cell. This is vital for comprehending the difficult pathophysiology of male infertility and the ultimate achievement of Assisted Reproductive Techniques. This book deals with all such issues in a detailed manner.