Post-cooling semen processing and sperm re-suspension as an alternative method to circumvent poor semen cooling in stallions.
Authors: Segabinazzi Lorenzo, Carmo Marcio T, Freitas-Dell'Aqua Camila de P, Alvarenga Marco A, Papa Frederico O, Canisso Igor F
Journal: Equine veterinary journal
Summary
# Editorial Summary Cooled-shipped semen remains the industry standard for equine artificial insemination, but a proportion of stallions produce ejaculates that deteriorate rapidly during conventional storage, resulting in poor post-thaw viability and reduced fertility outcomes. Segabinazzi and colleagues investigated whether processing semen after the cooling period—including centrifugation, resuspension in fresh extender, and controlled rewarming—could salvage sperm quality in these problematic ejaculates. Their post-cooling intervention demonstrated significant improvements in motility, viability, and DNA integrity compared to traditionally cooled samples, with results suggesting this approach may extend the window for successful insemination in poor-responder stallions. The findings carry particular relevance for practitioners managing valuable breeding stock where standard cooling protocols have consistently failed, offering a practical avenue to preserve genetic material that might otherwise be unsuitable for commercial use. Further work validating fertility outcomes and optimising protocols for routine application would strengthen the case for adopting this technique within studs and veterinary breeding centres.
Read the full abstract on PubMed
Practical Takeaways
- •For stallions whose semen quality deteriorates with standard cooling protocols, post-cooling processing and re-suspension represents a potential workaround to maintain breeding viability
- •This technique may expand breeding options for problem stallions and improve artificial insemination success rates in equine breeding programs
- •Consider implementing this method as part of stallion fertility management when conventional cooled-shipped semen protocols produce disappointing results
Key Findings
- •Post-cooling semen processing and sperm re-suspension offers an alternative approach for stallions with poor semen cooling responses using standard techniques
- •This method addresses the critical need for alternative strategies when conventional cooled-shipped semen procedures result in suboptimal sperm quality and fertility