Comparing DNA Damage Assays in Equine Sperm Preservation Background & Purpose Preserving sperm DNA integrity is critical for successful equine assisted reproduction. While low-temperature storage is traditional, above-15°C methods have emerged to reduce cold shock damage. Oxidative stress during any preservation method can cause DNA damage. This study compared the sensitivity of two DNA damage assays — the… Read More »
Dismount Semen Sample Evaluation, Post-Mating Antibiotics, and Mare Clinical Parameters Background Purpose In Thoroughbred breeding, in-hand mating is the only permitted method, and dismount semen sample evaluations are routinely collected to confirm ejaculation and assess semen quality. Post-mating uterine antibiotic infusions (ceftiofur or ticarcillin) are commonly used to reduce infection risk. This study examined whether dismount sample characteristics… Read More »
ISSR-8 “Snippets” The 8th International Symposium on Stallion Reproduction Held in Spain in February 2025, ISSR-8 produced a variety of useful research with immediate clinical value. We are honoured to have been permitted to share ISSR-8 presentation “snippets” of the research by – and in association with – the International Society for Equine Reproduction Presentations included a wide… Read More »
Counting Sperm With a Hemocytometer Counting sperm to determine concentration is an essential part of evaluating or processing semen, and counting sperm with a hemocytometer is a very accurate method when performed correctly. In order to do anything with a reasonable expectation of success when preparing semen for use, one needs to know the raw sperm concentration. There… Read More »
Processing Equine Semen It’s not difficult to correctly process equine (horse) semen for on-farm insemination or shipping, but it is one about which we often receive questions. Here we look at the basic steps behind achieving a good shipment. This article reviews management of a straightforward stallion. Poor quality semen or that with specific issues – although briefly… Read More »
Does Routine Monitoring for EVA Make a Difference? With the announcement this week of an outbreak of equine viral arteritis in PEI in Canada, a very reasonable question to ask is “does routine monitoring for EVA make a difference?” At the recent ISER meeting in Brazil, Kaps et al. reviewed the effects of monitoring and management practices on… Read More »
ISER XIII “Snippets” – Held in Brazil in August 2023, ISER XIII produced a variety of useful research with immediate clinical value, here we review some of the presentations The thirteenth International Symposium on Equine Reproduction (ISER XIII) was held in Foz do Iguaçu, Brazil between July 10th–14th, 2023. Around 400 veterinarians, researchers and animal scientists were present,… Read More »
Bacterial Infection of a Stallion’s Reproductive Tract – A case report of the bacterial infection of a stallion’s reproductive tract with images and outcome… A bacterial infection of a stallion’s reproductive tract is comparatively rare. When present, one of the first indicators is often the condition of the semen, or in the case of live cover where semen… Read More »
Centrifugation of Stallion Semen – Tips and tricks for centrifugation of stallion semen, with a G-rate (RCF) calculator. Why centrifuge semen? See this article! By Jos Mottershead Why Centrifuge Semen? There are a number of reasons why one would choose to centrifuge stallion semen other than the obvious reasons such as during preparation prior to freezing. One of… Read More »
Equine Viral Arteritis (EVA) – A summary of information about a disease with reproductive implications. This equine viral arteritis factfile shoots down some myths. There are many myths and much misinformation surrounding the disease equine viral arteritis (EVA). Here we present a list of facts in an attempt to assist in clarification and education for the breeding public.… Read More »
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