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Effect of exogenous ammonia on the percentage of (a) progressive motility, (b) viability and (c) acrosome‐reacted live spermatozoa over a 0–4 h incubation of porcine spermatozoa. Each line with an error bar represents the mean ± standard error (n = 5). Different letters indicate significant differences (P < 0.05) among the treatments in the same incubation period.
