Our insight into the mechanisms of the physiology of reproduction has experienced a swift and constant development these last few years. The advent of more sophisticated diagnostic methods and their relatively easy clinical application allow for the incorporation of that knowledge into the evaluation of the infertile couple. These facts, together with an obvious change in social psychology, have facilitated the development of different specialities dealing with the problems of infertility. It is now possible in medical centers all around the world to undertake a better disposition of the...