Investigations into the mechanisms of spennatogenesis, sperm matura tion and fertilization provide the basis of our understanding of male re productive physiology. Since in recent years molecular and cellular en docrinology has provided particularly important contributions to our knowledge, the European Workshops on Molecular and Celluar Endo crinology of the Testis, held regularly during even years since 1980, have become a prominent forum for researchers in the field to discuss recent findings and exchange new ideas. The most recent of these Testis Workshops, the 7th, was held on May 5 -...