Vasectomy success rates

Vasectomy is successful in more than 99 percent of men.  Other methods of contraception are required until a semen analysis confirms there are no sperm in the semen.

The sperm count is checked approximately three months after the procedure.  A man needs to have had at least 20 ejaculations after vasectomy to clear the ducts of sperm.

A sperm count requires that the man give a semen sample obtained by masturbation.  When sperm remains present a repeat semen test is required.

If the semen analysis shows sperm that do not move there is a small chance that a pregnancy may occur.  Other methods of contraception should be continued until a clear test result is completed