It is important to perform your sperm test 3 months after your vasectomy to confirm that it has been successful. There are still millions of sperm in the pipes downstream from the site of vasectomy and these can still cause pregnancy. These sperm are gradually cleaned out with each ejaculation after your vasectomy.
We recommend at least 20 ejaculations prior to performing your sperm test after 3 months. If you complete your 20 ejaculations earlier you will still need to wait until the 3 month mark before you perform the sperm test, as there is a very small risk of the vas deferens rejoining in the first 3 months.
You will need to keep using additional means of contraception until you receive your sperm result from us.