Disclosed is a heterogeneous inseminate, comprising: a) a first amount of sperm of a first animal； and b) a second amount of sperm of a second animal combined with said first amount of sperm of said first animal, said first animal and said second animal of the same species, wherein one of said first amount of sperm or said second amount of sperm comprises sex selected sperm； wherein said first amount of sperm has sufficient concentration in said heterogeneous inseminate to increase motility of said second amount of sperm in said heterogeneous inseminate. Also disclosed is a method of manufacture of the heterogeneous inseminate.
