In the present study of 50 patients, it was determined that those with seminal deficiencies in masturbated samples showed greater improvement in semen parameters with I-SCD use than the nondeficient groups with which they were compared. The use of I-SCD in oligospermia and OTA Syndrome is therefore indicated, both diagnostically and therapeutically. The subjective rating of sexual stimulation elicited when I-SCD was used was far superior than with masturbation. It is believed the success of I-SCD is due, in part, to this greater degree of sexual stimulation, presumably by added loading of the vas deferens prior to ejaculation.