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  • Title: Motility and fertility of boar semen after liquid preservation at 5°C for more than 2 weeks.
    Author: Namula Z, Sato Y, Kodama R, Morinaga K, Luu VV, Taniguchi M, Nakai M, Tanihara F, Kikuchi K, Nagai T, Otoi T.
    Journal: Anim Sci J; 2013 Aug; 84(8):600-6. PubMed ID: 23607795.
    Abstract:
    This study investigated the effects of skim milk on the quality and fertility of boar spermatozoa under long-term chilled preservation. Semen samples were stored in Modena solution supplemented with 0 (control) to 50 mg/mL skim milk at 5°C for 4 weeks; spermatozoa stored with 7.5 and 15 mg/mL of skim milk (7.5-SM and 15-SM groups, respectively) exhibited significantly higher motility indices than those of the control group up to 3 weeks (P < 0.05), and the 7.5-SM group showed improved motility indices even after 4 weeks (P < 0.05). In vitro fertilization using spermatozoa in the 7.5-SM and 15-SM groups stored at 5°C for 2 weeks showed significantly higher fertilization rates of spermatozoa and the development rates to blastocyst than the control group (P < 0.05), and the 7.5-SM group showed similar rates of fertilization and blastocyst formation in the fresh non-stored spermatozoa group. After artificial insemination using spermatozoa stored for 2 weeks in the 7.5-SM group, healthy piglets were obtained. Boar spermatozoa can be stored at 5°C in a Modena solution containing skim milk. Supplementation of 7.5 mg/mL skim milk improves boar spermatozoa motility and fertility even after liquid preservation at 5°C for 2 weeks.
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