A minor operation to block or cut the tubes carrying sperm.

There are no sperm present in the semen.

This method is usually only chosen by men who are not intending to have any (further) children. For this reason it is rarely performed on young men.

Over 99% effective. This means that fewer than 1 in every 100 women whose partners have been sterilised will become pregnant each year.

• Permanent method of contraception.

  

  Does not protect against sexually transmitted infections (STIs). 

  In a small number of men the tubes may rejoin.