In order to confirm sterility after your vasectomy procedure, you must perform two semen analysis tests at least 6 weeks after your procedure. Submit each test to the MaleFromHome testing service about 2 weeks apart. When each test is complete and no sperm are seen in your sample, your vasectomy is considered successful.
In rare cases, late recanalization of the vas deferens may occur. For this reason, many urologists suggest re-testing one year after vasectomy.