Components of stallion seminal plasma and the effects of seminal plasma on sperm longevity
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Updated: Jul 4, 2026

Sperm Collection of Differential Quality Using Density Gradient Centrifugation
Published on: November 29, 2018
Maria Kareskoski1, Terttu Katila
1University of Helsinki, Faculty of Veterinary Medicine, Department of Production Animal Medicine, Saarentaus, Finland. maria.kareskoski@helsinki.fi
Abstract:
Seminal plasma is a mixture of secretions produced in the testes, epididymides and accessory sex glands, and ejaculated as several consecutive fluid fractions. The composition of seminal plasma and the effects on sperm longevity vary between fractions and individual stallions. This review focuses on the sequence of ejaculation, constituents of seminal plasma and their potential use as fertility markers as well as the influence of seminal plasma on spermatozoa during storage.
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