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What causes dead sperm in Duroc boars?
Summary Not often used: Duroc boars that have been idle for a relatively long time will show a large number of aged and dead sperm in their semen. Malnutrition: when there is a lack of nutrients, it will cause a large number of sperm in its semen to die; at this time, nutrition needs to be improved. Mixing in harmful substances: during ejaculation and semen collection