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  • Title: In vitro fertility and motility characteristics of frozen-thawed boar epididymal spermatozoa separated by Percoll.
    Author: Suzuki K, Nagai T.
    Journal: Theriogenology; 2003 Nov; 60(8):1481-94. PubMed ID: 14519469.
    Abstract:
    Frozen-thawed epididymal spermatozoa from four boars were separated through a Percoll gradient, and motility characteristics and in vitro fertility were assessed. Percoll-separated spermatozoa had a significantly higher percentage of motile and progressively motile spermatozoa than those that were not separated (P < 0.0001). However, there were no clear differences in other motility parameters between Percoll-separated and un-separated spermatozoa. Furthermore, sperm agglutination was decreased by Percoll separation (P < 0.05). The effects of Percoll separation on in vitro fertility of spermatozoa differed among boars. In addition, there were large differences in fertility between sperm samples in vitro. Sperm samples, which indicate highly motile and progressively motile, did not always show high in vitro fertility. Furthermore, there was no distinct pattern between fertility in vitro and motility parameters. There was no difference in fertility in vitro between Percoll-separated and un-separated spermatozoa from two of the four boars. However, in vitro fertility of Percoll-separated spermatozoa was higher than that of un-separated spermatozoa from the other two boars.
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