Abstract
Time required for motility to decline to a rating of 2(0 to 5 motility scale) Was 8, 12, and 25 days respectively for semen stored in vitro (0 to -3[degree]C) in heated skimmilk glycerol, egg yolk citrate glycerol, and heated skimmilk with egg yolk glycerol. Optimum composition of the latter extender was approximately 82% heated skimmilk, 10% egg yolk, and 8% glycerol.