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Ejaculatory failure associated with aortic-iliac thrombosis in two stallions
S M McDonnell1, C C Love, B B Martin
1Section of Reproductive Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center, Kennett Square 19348.
Insights
Aortic-iliac thrombosis can cause ejaculatory dysfunction in breeding stallions. Management strategies involving arousal enhancement and reduced exertion enable continued breeding performance.
Area of Science:
- Veterinary Medicine
- Reproductive Biology
- Equine Science
Background:
- Ejaculatory dysfunction in stallions can impact breeding programs.
- Aortic-iliac thrombosis is a vascular condition affecting blood flow.
Observation:
- Two stallions presented with specific ejaculatory dysfunction.
- Both stallions exhibited significant aortic-iliac thrombosis (60-70% lumen occlusion).
- Libido and initial mounting were normal, but thrusting weakened with exertion, leading to awkward dismounts.
Findings:
- Treatment focused on maximizing sexual arousal and minimizing hind limb exertion during breeding.
- A progressive daily exercise program was implemented.
- These interventions allowed stallions to resume breeding activities.
Implications:
- Aortic-iliac disease should be considered in the differential diagnosis for equine ejaculatory dysfunction.
- Management strategies can improve breeding performance in affected stallions.
- Understanding vascular contributions to reproductive health is crucial in equine practice.
Abstract:
Two mature breeding stallions were evaluated because of specific ejaculatory dysfunction, and each was found to have aortic-iliac thrombosis occluding 60 to 70% of the aortic lumen. In each case, the stallion had strong libido, normal mounting, and vigorous initial thrusting. With continued exertion, thrusting became weak and dismount was awkward. Treatment aimed at maximizing sexual arousal before mounting and reducing hind limb pain and exertion during breeding allowed these stallions to continue breeding. A program of gradually increasing daily exercise also was associated with improved breeding performance during subsequent breeding seasons. In cases of specific ejaculatory dysfunction, aortic-iliac disease should be included among the differential diagnoses.