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Sylvia J. Bedford-Guaus, DVM, PhD, DACT

Specialties and Expertise

  • Theriogenology, companion animals, equine and camelid; Assisted reproduction technology, equine and canine; General medicine and surgery, companion animals, equine and camelid


  • DVM: Universitat Autònoma de Barcelona, Spain
  • MS: Colorado State University
  • Residency: Tufts University; University of Pennsylvania
  • PhD: University of Massachusetts


  • Diplomate, American College of Theriogenologists (ACT)

Select Awards, Achievements, and Publications

  • Bedford-Guaus SJ, Kim S, Mulero L, et al. Molecular markers of putative spermatogonial stem cells in the domestic cat. Reprod Domest Anim. 2017;52(suppl 2):177-186.
  • Bedford-Guaus SJ, McPartlin LA, Varner DD. Characterization of equine phospholipase C zeta: preliminary evidence for expression defects in subfertile stallions. J Eq Vet Sci. 2012;32:445-450.
  • Bedford-Guaus SJ, McPartlin LA, Xie J, Westmiller SL, Buffone MG, Roberson MS. Molecular cloning and characterization of phospholipase C zeta in equine sperm and testis reveals species-specific differences in expression of catalytically active protein. Biol Reprod. 2011;85:78-88.
  • Bedford-Guaus SJ. Transported stallion semen and breeding mares with cooled or frozen-thawed semen. Clin Tech Equine Pract. 2007;6(4):239-248.
  • Bedford SJ, Varner DD, Meyers SA. Effects of cryopreservation on the acrosomal status of stallion spermatozoa. J Reprod Fert Suppl. 2000;56:133-140.