Equine Reproduction Service

Equine Reproduction Service

Welcome to the Equine Reproduction Service at the UC Davis Veterinary Medical Teaching Hospital. Faculty and resident veterinarians in the service provide routine and advanced reproductive care to patients at the VMTH.

Services provided for mares include diagnostic work-ups on infertile mares, artificial insemination, ultrasonographic pregnancy diagnosis, twin reduction, pregnant mare care, obstetrics, and foaling management. In addition, our clinicians manage mares experiencing dystocia (difficult foaling), working in close collaboration with veterinarians specializing in surgery, neonatology, critical patient care and anesthesia.

Services provided for stallions include fertility evaluation, investigation of infertility, stallion breeding management, semen collection and evaluation, preparation and shipment of cooled semen, and freezing of semen. Also available are advanced reproductive technologies, including transvaginal aspiration of oocytes, ICSI, embryo transfer and collection and freezing of epididymal sperm.

Clinical Activities and Procedures

Medical/Obstetrics Services

A board-certified veterinary specialist in the obstetrics area of theriogenology and a veterinary technician are always available at the Veterinary Medical Teaching Hospital, where we can evaluate horses with medical needs such as:

  • Dystocia
  • Healthy broodmare management when accompanying sick foals
  • Late twin reduction
  • Fetal loss
  • Retained placenta
  • Endometrial cysts
  • Reproductive system tumors
  • High-risk pregnancy monitoring and foal watch
  • All manner of stallion fertility complaints

Reproduction Services

A board-certified veterinary specialist in reproduction area of theriogenology and a veterinary technician are always available at the Center for Equine Health, where we can evaluate horses with reproductive needs such as:

  • Mare breeding management
  • Advanced Equine Assisted Reproduction (EqART): ICSI, Oocytes, and Embryos
  • Pregnancy evaluations
  • Early twin reduction
  • Mare infertility evaluations
  • Healthy pregnant mare foal-watch
  • Full embryo transfers services, including a recipient mare herd
  • Stallion semen collection and processing for shipment
  • Stallion semen freezing
  • Stallion training for semen collection
  • Stallion infertility evaluations
  • Limited space for select breeding stallions “to stand”


Ghislaine DujovneGhislaine Dujovne, DVM, MS, DACT
Chief of Service




Daniela OrellanaDaniela Orellana, DVM
Resident II




villanuevaEduardo Santos Villanueva, DVM
Resident I




Sarah Koshak

Alanna Schober