However, in bulls, no significant correlation between the percentage of motile spermatozoa evaluated by CASA and the 59-day NRR (nonreturn rate) has been found, whereas highly significant correlations were detected when CASA parameters describing the velocity of motile spermatozoa or the trajectory line of motile spermatozoa were included [ 32 ].
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Ram Sperm Motility Parameters under The Influence of Epidermal Growth Factor.
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