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Effects of zinc, D-Asp and CoQ10 on sperm DNA fragmentation. A) Sperm suspensions of normospermic (n = 4) and oligospermic (n = 4) samples labeled through the TUNEL assay (pooled data). B) Representative micrograph of spermatozoa labeled with Hoechst (blue) and TUNEL (green). Bar, 20 μm # # Significant differences versus control at 0 h (P < 0.01); ** Significant differences versus control at 6 h (P < 0.01).
