Table 1

Groups	TBARS (nM MDA/10⁸/^h sperm)		SOD (USod/g protein)		CAT (UCat/mg protein)
Table 1. Oxidative stress markers (mean ±SD) in samples of infertile (n=20) and fertile men (n=10) treated with ascorbic acid (10.0 mM) or not.
Groups	Infertile	Fertile	Infertile	Fertile	Infertile	Fertile
Pre-freeze without ascorbic acid	4.08 ± 0.05^a*	2.56 ± 0.05^a#	8.10 ± 0.14ª^*	11.86 ± 0.20^a	1.47 ± 0.07^{a^*}	4.78 ± 0.04^a
Post-thaw without ascorbic acid	7.96 ± 0.05^b*	4.94 ± 0.0^b	3.17 ± 0.07^{b^*}	10.06 ± 0.10^a	3.41 ± 0.07^b*	49.63 ± 2.79^b
Post-thaw with ascorbic acid 10.0 mM	5.92 ± 0.05^c*	4.64 ± 0.07^b	6.52 ± 0.10^{c^*}	9.23 ± 0.14^a	4.50 ± 0.15^b*	47.00 ± 1.42^b

MDA= malondialdehyde. ^#Values followed by different letters differ significantly, according to Wilcoxon test (p≤0.05) for each group. ^*Values statistically different from the fertile group, according to Mann-Whitney U test (p≤0.05).