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Relationships between Response to FAA (Fertility-Associated Antigen) and Semen Characteristics and Conception Rate of Artificial Insemination in Hanwoo  

Lee, Seoung-Soo (Hanwoo Improvement Center, NACL)
Noh, Seung-Hee (Hanwoo Improvement Center, NACL)
Park, No-Hyung (Moksan Hanwoo Research Institute)
Won, You-Seog (Hanwoo Improvement Center, NACL)
Publication Information
Journal of Embryo Transfer / v.26, no.1, 2011 , pp. 9-12 More about this Journal
Abstract
This study was undertaken to determine whether the presence of fertility-associated antigen (FAA) in semen would influence semen characteristics and conception rate of artificial insemination in Hanwoo. The response to FAA of 36 heads of proven bull, 7 heads of young bull, and 27 heads of performance-tested bull was that one proven bull was FAA-negative and the others were FAA-positive, therefore FAA-negative bull was 1.4%. FAA-negative bull was lower in first and second semen concentrations than those of FAA-positive bull in 5,301 semen of 21 heads of proven bull, then FAA-negative bull was fewer as 11.5% in total sperm counts. The estrus of 22 heads was 70d-nonreturned in 36 cows first inseminated with frozen semen of FAA-negative bull, but that of 249 heads in 378 cows first inseminated with frozen semen of FAA-positive bull. Each conception rate was 61.1% and 65.9%, respectively. The difference of conception rates was 4.8%. These results indicate that the response of FAA to semen were influenced semen characteristics and conception rate of artificial insemination, but further investigations are needed to confirm the results.
Keywords
fertility-associated antigen; semen characteristics; conception rate;
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