Usually the sperm analysis results come in fairly quickly (sometimes on the same day). I advise patients to wait 1 week and if they have not received any information from us, to contact us. About 80% of men will be azoospermic at this point (no evidence of sperm in the sample). If there are sperm seen in the sample, then it depends how many and how motile the sperm are. If there are a few non-motile sperm, then the Royal Australian College of Surgeons advise repeat monthly testing until there are no sperm or there are 2 samples in a row showing few non-motile sperm at least 7 months after vasectomy.