Abstract
In an attempt to clarify the male infertility and develop new methods for male contraception, researches have focused on local regulators of intratesticular events. Androgen and estrogen receptors are involved in spermatogenesis and testosterone plays a role on the blood-testis barrier (BTB). Varicocele or dilatation of the spermatic vein, pampiniform plexus, and the collaterals leading t…