Digital pressure or massage and use of an artificial vagina are the two most common methods of semen collection in livestock species. The decision as to which one is best for a given animal is based on several factors, including male reproductive physiology and behavior, quality of semen obtained, and the technical expertise required for a successful collection. The best collection procedure for a given animal is the one that most closely simulates the social and physiological stimuli that occur during natural mating (Table 1).
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