Conflict of Interest The Author declares no conflicts of interest.
References and Footnote
1. Oberg EV. Machinery’s Handbook: A Reference for the Me- chanical Engineer. 22nd ed., New York, NY: Industrial Press; 1984.
2. Love CC, Garcia MC, Riera FR, et al. Evaluation of mea- sures taken by ultrasonography and caliper to estimate tes- ticular volume and predict daily sperm output in the stallion. J Repro Fert Suppl 1991;44:99–105.
3. Love CC, Garcia MC, Riera FR, et al. Use of testicular volume to predict daily sperm output in the stallion. Proc Am Assoc Eq Pract 1990;36:15–21.
4. Johnson L, Varner DD, Roberts ME, et al. Efficiency of spermatogenesis: A comparative approach. Anim Reprod Sci 2000;60–61:471–80.
5. Stich K, Brinsko S, Thompson J, et al. Stabilization of ex- tragonadal sperm reserves in stallions: Application for deter- mination of daily sperm output. Theriogenology 2002;58: 397–400.
aDormosedan, Pfizer Animal Health, New York, NY 10017.