PVSAs (n524,292) had a mean of 80 days from vasectomy to first PVSA, and patients with 3+ total PVSAs (n57,826) had a mean of 70 days from vasectomy to first PVSA.A 2015 retrospective analysis of military service members who had a vasectomy from 2008 to 2013 with one or more PVSAs retrospectively applied the 2012 AUA guidelines compared with their previous institutional protocol requiring repeat PVSAs (N51,623). 2 Of the identified patients, 55% completed a PVSA (N5895). Using the 2012 AUA guidelines definition of successful vasectomy, if the first PVSA was performed ,60 days from the vasectomy, the success rate 87%, compared with if the first PVSA was 61 to 90 days, success rates were 95%, at 91 to 120 days, success was 98%, and at .120 days, success was 100% (ANOVA P,.001). Validity was limited by size and the military population not representing the rest of the population regarding health and age.The 2012 evidence-based AUA vasectomy guidelines define vasectomy success according to a single uncentrifuged sample with azoospermia or rare nonmotile sperm (,100,000 nonmotile sperm/mL). 3 The guideline also stated that timing of first PVSA after vasectomy can occur anytime between 8 and 16 weeks after vasectomy (based on panel consensus).