This study  was carried  out on 200 primary  infertile   men  ( 140  with. clinical  varicocele   and

60 without  varicocele).   All cases  were subjected  to  scrotal   ultrasonographic measurement of vein caliber  in the pampiniform   plexus. Ultrasonography proved  superior  to physical  examination  in terms  of sensitivity  and specificity.  The  incidence   of  bilateral   varicocele   by ultrasonography   was 821140 (58.6%)  as compared  to   that    found      clinically     82/140 (22.85%).   Also  it was found  that left testicular volume  was  statistically   significant   less   than right  testicular   volume   in.   infertile   men  with. clinical and  subclinical left  varicocele.   The same findings  were  detected  in bilateral  clinical and  bilateral  subclinical    varicoceles.  Also ultrasonography showed  that the mean difference  between  right  and  left  testicular   volume was  lower   in fertile  men  without   varicocele than  in either fertile   or infertile   men  with left varicocele.   However,   the  mean  difference   beween  right and left testicular  volume  infertile and infertile  men  with  varicocele  was similar, suggesting  that the reduction   of testicular  volume is not predictive  of fertility.