When the artificial vagina was used, all the recoveries were effective (40 ejaculates)
whereas when semen was collected by electroejaculation, 38 ejaculates (from 40 attempts)
were obtained and 3 ejaculates (from different males) then suspected of being
contaminated with urine were eliminated from the study (finally 35 ejaculates were
processed and evaluated). The mean voltage required to produce ejaculation was
6.8 0.1 V, being similar between males