ABSTRACT
Each year approximately 15% of couples trying to conceive for the first time will be unable to do so. A sole male factor is responsible in 20% of cases , while in an additional 30% the male factor is contributory. The evaluation of the infertile male proceeds as with the evaluation of any other medical problem. A thorough history and physical examination is performed, fol lowed by appropriate laboratory tests . Ideally, this evaluation identifies the etiology of the male's infertility and leads to appropriate and specific ther apy. Unfortunately, in many cases. the etiology of the male's infertility re mains unknown.
