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Post-thaw viability of bull AI-doses with low-sperm numbers》.pdf
Theriogenology 68 (2007) 934–943 Post-thaw viability of bull AI-doses with low-sperm numbers a,b b a ˚ ˚ c e J. Ballester , A. Johannisson , F. Saravia , M. Haard , H. Gustafsson , D. Bajramovic d, H. Rodriguez-Martinez a,* a Division of Reproduction, Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden b Department of Anatomy and Physiology, Faculty of Veterinary Medicine and Animal Science, SLU, Uppsala, Sweden c ¨ Svensk Avel, Ornsro, Skara, Sweden d Hansa Husdjur, Barkestorp, Kalmar, Sweden e Swedish Dairy Association, Stockholm, Sweden Received 13 April 2007; received in revised form 25 May 2007; accepted 14 July 2007 Abstract Use of AI-doses containing low-sperm numbers are increasingly been used to optimise use of elite bulls as well as to accommodate an eventual wider application of sex-sorted semen. Since spermatozoa might, however, suffer from high extension rates, thus compromising fertility, this study evaluated the post-thaw sperm quality of semen from commercial progeny-tested, high-ranked AI-sires whose semen was within ac
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