The relationship between sperm quality in cool-shipped semen and embryo recovery rate in horses |
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| Institution: | 1. Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA;2. Noble Equine Veterinary Service, Purcell, Oklahoma, USA;3. Katy, Texas, USA;4. Houston, Texas, USA;5. Department of Animal and Dairy Science, Mississippi State University, Starkville, Mississippi, USA;1. Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany;2. Unit of Reproductive Medicine–Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany;3. Lower Saxon National Stud Celle, Celle, Germany;1. Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover (Foundation), Hannover, Germany;2. Unit of Reproductive Medicine—Clinic for Horses, University of Veterinary Medicine Hannover (Foundation), Hannover, Germany;3. Lower Saxon National Stud Celle, Celle, Germany |
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| Abstract: | The relationship between the quality of cool-shipped stallion semen and fertility has not been adequately described. This study evaluated sperm quality of cool-shipped semen from 459 ejaculates (N = 130 stallions) that were used for insemination of 196 embryo donor mares (n = 496 estrous cycles). Embryo recovery rate (ERR; %) increased, as all sperm measures (e.g., motility, viability, DNA quality, morphology, concentration, and total number) increased. Threshold values are reported for each sperm quality measure (e.g., total sperm motility ≥ 65%) that separate two ERR groups (e.g., average: ～50% ERR; high: ～65% ERR). |
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| Keywords: | Stallion Sperm quality Embryo donor Fertility |
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