Andrology, a counterpart to gynecology, deals with the study of the male reproductive organs. Clinical andrology has been neglected primarily because of the lack of relevant, accurate laboratory methods for functional analysis, but in the last decade substantial progress has been made in the understanding of male reproductive biology. This progress has resulted from modern tech niques and instrumentation in microanatomy, immunology, neurophysiology, pathology, genetics, endocrinology, biochemistry, biophysics, urology and surgery. These studies are scattered in such a wide spectrum of...