The varicocele and its association with infertility have been recognized for many centuries. Despite approximately 1000 reports in the literature on varicocele over the past 10 years, our understanding of this condition has advanced very little. As more well- controlled studies are done and basic research on the pathophysiology of the varicocele is carried out, perhaps the problems of diagnosis and treatment of varicocele will be resolved (Pryor and Howards, 1987). Varicocele is the most common surgically correctable abnormality in the subfertile male. Unlike the generalpopulation in which varicocele has an incidence of 15-20%, in the infertility population one third or more (9-41%) will have a scrotal varix (Hunter and Keith, 1995). Most varicoceles occur as a result of incompetent internal spermatic venous valves or collateral bypass of competent valves with resultant free reflux of venous blood into the pampiniform plexus (Roger et al, 1987). Given the association between varicocele and male subfertility as well as the potential for enhanced fertility following varicocele repair, considerable attention has been devoted to improving techniques for the diagnosis and treatment of this lesion (Randall et al, 1994).