Objectives To assess the effect of varicoceles on testicular blood flo
w in man. Methods. Testicular blood flow was measured in 248 consecuti
ve men attending an infertility clinic and 34 fertile volunteers using
color duplex ultrasonography. Results. The testicular blood flow of m
en with either clinical and/or subclinical varicoceles was not signifi
cantly different from controls without varicoceles. Conclusions. Varic
oceles do not significantly alter testicular blood flow in man.