The best temperature to keep semen in order to preserve sperm motility is 20 degrees C. Loss of motility at 37 degrees C is not entirely prevented by prevention.
Fertil Steril. Aug;68(2) Effect of increased scrotal temperature on sperm production in normal men. Wang C(1), McDonald V, Leung A, Superlano L.
Sperm production in humans and other mammals is dependent on the temperature of the testicles. Sperm is optimally produced when the.