Journal of Equine Veterinary Science
Volume 30, Issue 4 , Pages 187-190 , April 2010

Pregnancy Rates in Tranquilized Maiden Thoroughbred Mares

  • T.L. Blanchard, DVM, MS, Dipl ACT

      Affiliations

    • Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
    • Corresponding Author InformationReprint Requests: T. Blanchard, DVM, MS, Dipl ACT, Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4475.
    • ,
  • J.A. Thompson, DVM, DVSc, Dipl ACT, Dipl ACVPM (Epidemiology)

      Affiliations

    • Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
    • ,
  • S.P. Brinsko, DVM, MS, PhD, Dipl ACT

      Affiliations

    • Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
    • ,
  • D.D. Varner, DVM, MS, Dipl ACT

      Affiliations

    • Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
    • ,
  • C.C. Love, DVM, PhD, Dipl ACT

      Affiliations

    • Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
    • ,
  • J. Ramsey, BS, MA

      Affiliations

    • Hill ‘n’ Dale Farm, 4252 Spurr Road, Lexington, KY
    • ,
  • A. O'Meara, BS

      Affiliations

    • Hill ‘n’ Dale Farm, 4252 Spurr Road, Lexington, KY

References 

  1. Katila T, Sankeri S, Makela O. Transport of spermatozoa in the mares genital tract studied by a scintigraphic method. J Reprod Fertil Suppl. 2001;56:571–578
  2. Scott MA, Liu IKM, Overstreet JW, Enders AC. The structural morphology and epithelial association of spermatozoa at the uterotubal junction: a descriptive study of equine spermatozoa in situ using scanning electron microscopy. J Reprod Fertil Suppl. 2000;56:415–421
  3. Brinsko SP, Varner DD, Blanchard TL, Meyers SA. The effect of postbreeding uterine lavage on pregnancy rates in mares. Theriogenology. 1990;33:465–476
  4. Nanda AS, Brearley JC, Dobson H. Effect of barbiturate anaesthesia on oestradiol-induced LH release in dairy cows. Anim Reprod Sci. 1992;27:335–339
  5. Blanchard TL, Thompson JA, Brinsko SP, Love CC, Varner DD, Basson M, et al. Effects of breeding to ovulation interval and repeat service (‘doubles') during the same estrus on pregnancy rates in Thoroughbred mares. In: Proceedings of the 53rd Annual meeting of the American Association of the Equine Practitioners. 2007;568–570
  6. Lunn DJ, Thomas A, Best N, Spiegelhalter D. WinBUGS—a Bayesian modelling framework: concepts, structure, and extensibility [WinBugs user manual, version 1.4, Available at: http://www.mrc-bsu.cam.ac.uk/bugs]. Stat Comput 2000;10:325–337.
  7. Knight AP. Xylazine. J Am Vet Med Assoc. 1980;176:454–455
  8. LeBlanc MM, Hubbell JA, Smith HC. The effects of xylazine hydrochloride on intrauterine pressure in the cow. Theriogenology. 1984;24:681–690
  9. Janssen CA, Lowe KC, Nathanielsz PW. The effects of xylazine on uterine activity, fetal and maternal oxygenation, cardiovascular function, and fetal breathing. Am J Obstet Gynecol. 1984;148:386–390
  10. Marnet PG, Carcia-Villar R, Laurentie MP, Toutain PL. In vivo pharmacological characterization of alpha adrenergic receptors in sheep myometrium and their physiological meaning. Biol Reprod. 1987;37:241–248
  11. Rodriguez-Martinez H, McKenna D, Weston PG, Gustafsson BK, Whitmore HL. Uterine motility in the cow during the estrous cycle. III. Effects of oxytocin, xylazine, and adrenoreceptor blockers. Theriogenology. 1987;27:359–368
  12. Gibbs HM, Troedsson MHT. The effect of acepromazine, detomidine and xylazine on myometrial activity in the mare. Biol Reprod Mono. 1995;1:489–493
  13. De Lille A, Silvers ML, Cadario ME, Tran TQ, Cage CL, LeBlanc MM. Interactions of xylazine, acepromazine with oxytocin and the effects of these interactions on intrauterine pressure in normal mares and mares with delayed uterine clearance. J Reprod Fertil Suppl. 2000;56:373–379
  14. von Reitzenstein M, Callahan MA, Hansen PJ, LeBlanc MM. Aberrations in uterine contractile patterns in mares with delayed uterine clearance after administration of detomidine and oxytocin. Theriogenology. 2002;58:887–898
  15. Petroff BK, Ciereszko RE, Nakai R, Wagner KL, Watanabe G, Taya K. Effects of preovulatory tranquilization with xylazine on the timing of ovulation in the horse. J Equine Sci. 2005;16:67–72
  16. Thompson DL, Garza F, Mitchell PS, St. George RL. Effects of short-term stress, xylazine administration and anesthetization with xylazine plus ketamine on plasma concentrations of cortisol, luteinizing hormone, follicle stimulating hormone and prolactin in ovariectomized pony mares. Theriogenology. 1988;30:937–946
  17. Cross DT, Threlfall WR. Effect of xylazine on interovulatory interval and serum progesterone concentrations in the horse mare. Theriogenology. 1990;34:461–467
  18. Brooks AN, Lamming GE, Lees PD, Haynes NB. Opioid modulation of LH secretion in the ewe. J Reprod Fertil. 1986;76:693–708

PII: S0737-0806(10)00096-1

doi: 10.1016/j.jevs.2010.02.004

Journal of Equine Veterinary Science
Volume 30, Issue 4 , Pages 187-190 , April 2010

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