Predicting Breeding Soundness in Pre-, Peri- and Postpubertal Colts Background: The study aimed to identify parameters for predicting breeding soundness in colts at the youngest possible age Rearing colts for breeding is costly; early prediction of future fertility has significant economic value Study Design: 46 Warmblood colts examined at approximately 6 months, 20 months, and 30 months of… Read More »
Pharmacologically Induced Ejaculation in Stallions Since Drs. McDonnell and Love pioneered research into Pharmacologically Induced Ejaculation in Stallions in the 1990s1, “chemical collection” has been a tool in many advanced stallion manager’s and veterinarian’s collection tool box. The original research produced a tried-and-tested protocol involving Imipramine and Xylazine, and ultimately was considered successful in about 70% of stallions,… Read More »
Is there a Seminal Plasma Impact on Foal Growth? This study investigated the downstream developmental consequences of seminal plasma (SP) exposure — or its absence — at the time of breeding, examining both placental gene expression and seminal plasma impact on foal growth trajectories over the first two years of life. Background & Purpose: SP proteins serve key… Read More »
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 »
Stallion Conference – Poland – 19-21 November, 2025 Presented by the same management team the brought the “PolSKI” Equine Reproduction Conference to the veterinary world, this meeting is dedicated to the stallion. With presenters from all over the world who specialize in stallion reproduction, this meeting promises a variety of information for both the veterinarian and the advanced… Read More »
US CEM Outbreak – Update The CEM outbreak in Florida continues to produce new cases. The initial animal was a mare identified following breeding in May. Tracebacks commenced and to date there are a total of 43 cases, which include 16 domestic ponies (2 stallions, 1 mare, and 13 geldings), 14 riding horses of various breeds (all geldings),… Read More »
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