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Oklahoma State University
Center for Veterinary Health Sciences

Healthy Animals - Healthy People


Candace Lymon, DVM, DACT

candace lyman with horse

Candace Lyman is originally from Abilene, Kansas, where she completed both her undergraduate and veterinary training at Kansas State University. After graduation she performed a surgical and ambulatory internship at Ocala Equine Hospital in Ocala, Florida. She then moved to College Station, Texas to work in the Texas A&M Equine Embryo Laboratory. It was during her time in College Station that she became practiced in transvaginal aspiration of both mature and immature oocytes for the purposes of intracytoplasmic sperm injection (ICSI) and nuclear transfer (cloning) in the mare. Dr. Lyman continued on to perform a residency in Large Animal Reproduction at the University of Pennsylvania’s New Bolton Center in Kennett Square, Pennsylvania and spent a year in an equine private practice. Soon after, Dr. Lyman joined the faculty at Oklahoma State University where she now divides her time between the equine, canine, small ruminant and bovine case loads.

Betsy Coffman, DVM, DACT

betsy coffman with dog

Dr. Coffman obtained her undergraduate and veterinary degrees from the University of Tennessee as well as completing a Field Services internship in equine and food animal ambulatory medicine. After a short adventure in mixed animal private practice in east Tennessee, she accepted a residency in comparative theriogenology at The Ohio State University. She obtained a Masters’ degree and became a diplomate of the American College of Theriogenologists while at Ohio State. Dr. Coffman was a clinical assistant professor at North Carolina State University before joining the team at Oklahoma State this year. Her research focuses on the endocrinology and neuroendocrinology of reproduction and clinical interest is in comparative theriogenology.

Reed Holyoak, DVM, PhD, DVM, DACT, Bullock Professorship in Equine Theriogenology 

reed holyoak

G. Reed Holyoak is a professor, holds the Bullock Equine Reproduction Endowed Professorship and is Head of the Veterinary Clinical Sciences Department of the Center for Veterinary Health Sciences (CVHS) at Oklahoma State University. He received his B.S. in animal science in 1983 and M.S. in animal reproduction in 1984 from Brigham Young University before earning his DVM from Washington State University in 1988 and PhD from University of Kentucky in 1992. 

Active in research as well as teaching, Holyoak specializes in the area of theriogenology, the study of animal reproduction.  Holyoak’s current research projects include reproductive infectious diseases with equine arteritis virus and others; histopathologic and ultrasonographic assessment of infertility in the male and female of large animal species; and the integration of traditional Chinese acupuncture within western veterinary medicine. He was board certified as a diplomate by the American College of Theriogenology in 2000 and is a certified veterinary acupuncturist.