A high percentage of our patients failed to fulfill the clearance criteria recommended by the BAS and almost a quarter of them had to deliver more than 3 semen samples. So we find convenient to modify our guides and propose that our patients should receive 2 request forms from the practitioner for semen analysis in the 6th and the 7th month postoperatively and should return to global evaluation of both reports. In that moment most patients will be able to meet the applied criteria for success with just 2 semen samples. Those who fail to become sterile because of either technical failure or early recanalizatione may be advised to go to the urologist with just 2 semen analysis without unnecessary delay.