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  • Title: Influence of sperm cell dose and post-insemination backflow on reproductive performance of intrauterine inseminated sows.
    Author: Mezalira A, Dallanora D, Bernardi Ml, Wentz I, Bortolozzo FP.
    Journal: Reprod Domest Anim; 2005 Feb; 40(1):1-5. PubMed ID: 15654993.
    Abstract:
    This study was carried out to evaluate the effects of the sperm cell dose and semen backflow on the pregnancy rate and number of embryos of sows inseminated once at 0-24 h before ovulation, using an intrauterine technique. The results were analysed from a total of 211 sows assigned to three groups inseminated with doses of 0.25 x 10(9) (T1), 0.5 x 10(9) (T2) and 1.0 x 10(9) (T3) spermatozoa. Semen backflow was observed in 95% of the females (143/151) evaluated for this purpose. The percentage of semen backflow is close to two-third of the volume and the percentage of sperm is around 15% of the infused sperm dose. Intrauterine insemination can be successfully performed provided that at least 0.5 billion of sperm cell dose is infused at an interval of 0-24 h before ovulation.
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