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Effect of ZYP on epididymis sperm DFI. (A) Representative graph of sperm chromatin structure assay, (B) sperm DFI fragmentation index. The data are presented as mean ± SD (n = 6). The statistical significance level was set at *P < 0.05, **P < 0.01, ***P < 0.001. DFI: DNA fragmentation index. LZYP: low ZYP (1575 mg/kg/d). HZYP: high ZYP (3150 mg/kg/d).
