Daily sperm output was determined for each stallion at
0, 4, 8, and 12 wk, with 0 wk representing baseline values.
Ejaculates were collected at the Texas A&M University
Horse Center breeding facility using a breeding phantom
and a 33-cm length Missouri-model artifi cial vagina
(Nasco, Ft. Atkinson, WI), along with an intact Miniature
Horse mare in behavioral estrus for sexual stimulation