SOD1 and varicocele: MDA levels:Controls: 8.4 ± 1.3 pmol/mL;Infertile men with varicocele: 13.5 ± 2.8 pmol/mL(P<0.05 versus controls) NO levels:Controls: 11.3 ± 1.0 nmol/L;Infertile men with varicocele: 17.9 ± 4.1 nmol/L(P<0.05 versus controls);CAT, SOD, GPX, and ascorbic acid were significantly lower in infertile men with varicocele compared with fertile men (P values <.05, .01, .01, and .05, respectively)