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Theriogenology Group (Reproduction)

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Who We Are and What We Do

The Iowa State University Theriogenology Group is now providing state-of-the-art Advanced Reproductive Technologies to Production Animal producers throughout Iowa and the midwest.  Food animal clients include cattle, sheep, goats and swine and are treated on-site in the Large Animal Clinic or on farm. Most frequently, clients bring their livestock to the theriogenology specialists for bull breeding soundness exams, treatment of bull breeding injuries, cattle pregnancy determination. high risk pregnancy management, laparoscopic artificial insemination and embryo transfer.  Some procedures are conducted on an out-patient basis, while other procedures require a clinic stay of a few days or an entire cycle. Ultrasound capabilities, semen collection, semen cryopreservation and advanced diagnostics are readily available, as is general anesthesia for use as needed. Treatment rooms and surgical suites are equipped to accommodate the smallest ruminant to the largest bulls.

How To Access Our Services

We encourage a close working relationship with referring veterinarians and our specialists, but clients can contact our team directly for services. Animal owners or their DVMs should call the Large Animal Clinic for initial consultation and to make a specific appointment. Call 515-294-1500 for the Large Animal Clinic and ask to speak with our specialists. The Clinic, as part of the Lloyd Veterinary Medical Center, operates on weekdays, 8:00 am to 5:00 pm. The Large Animal Clinic schedules appointments on weekdays, 8:00 am to 5:00 pm.

For emergency calls during non-clinic hours or holidays, call 515-294-4900 to reach on-call hospital staff.


Patrick E. Phillips DVM, DACT
Section Leader
Senior Clinician/VDPAM
Scott and Nancy Armbrust Professorship in Reproduction

Theriogenologist, Bovine reproduction, Male Reproduction, Semen cryopreservation, Embryo Transfer, Small Ruminant Reproduction

Swanand Sathe BVSc, MVSc, MS, DACT
Section Leader
Assistant Professor/VCS
Theriogenologist, Small Ruminant Reproduction, Equine and Smalll Animal Reproduction, Laparoscopic AI, Surgical Insemination, Hormonal Assays
Tyler Dohlman, DVM   
Resident - Theriogenology/VDPAM
Ruminant Reproduction, Embryo Transfer, Graduate Research
Marianna Jahnke, MS
Lecturer, Embryologist/VDPAM
Embryo Transfer, Embryo Cryopreservation, Embryo Biopsy and Splitting, Donor and Recipient Management
Rochelle Panthen, RVT  
Veterinary Technician, Cryo Tech/VCS  
Semen Processing, Cryopreservation, Semen Shipping and Handling.



Society for Theriogenology

American College of Theriogenologists


Food Supply Veterinary Medicine
2412 Lloyd Veterinary Medicine
Iowa State University
Ames, IA  50011