Vasectomy

Also called 'male sterilisation'

Vasectomy is a permanent form of contraception, to prevent pregnancy. It involves a small operation performed in males, in which a tube (called vas deferens) within each testicle is clamped, cut or sealed. This prevents the release of sperm during ejaculation.

Key points

  1. Vasectomy is a permanent form of contraception that should only be considered when you are sure that you do not want to have a child in the future.
  2. It is very reliable and in most cases, will prevent pregnancy, but it is not quite 100% effective. About 1 in 2,000 men who have had a vasectomy will become fertile again at some point in the future.
  3. Vasectomy is a simple operation which takes about 15 minutes. It can be done at a family planning clinic, a doctor's surgery or a hospital.
  4. Having a vasectomy does not affect your sexuality or sex drive.

How well does vasectomy prevent pregnancy?

Vasectomy is very reliable and in most cases will prevent pregnancy, but it is not quite 100% effective.

  • About 1 in 2,000 men who have had a vasectomy will become fertile again at some point in the future. This is because, sometimes the two ends of the cut tubes (vas deferens) connect over time.
  • In a few cases, operations are not successful and tests show sperm are still present in semen after the operation. This occurs in less than 1 in 100 operations.

What are the advantages and disadvantages of a vasectomy?

Advantages

  • Vasectomy is a safer, cheaper procedure that causes fewer complications than tubal ligation in women (female sterilisation).
  • Vasectomy is a permanent method of birth control. Once your semen does not contain sperm, you do not need to worry about using other birth control methods.
  • Although vasectomy is expensive, it is a one-time cost. The cost of other methods, such as birth control pills or condoms and spermicide, is likely to be greater over time.

Disadvantages

  • The effect of a vasectomy in preventing pregnancy is not immediate; it may take a few months before the semen is free from sperm.
  • As a vasectomy is permanent, some people regret having a vasectomy, especially if their circumstances change. 
  • A vasectomy does not protect against sexually transmitted infections (STIs), including infection with the human immunodeficiency virus (HIV). Condoms are the most effective method for preventing STIs. 

How is a vasectomy done?

Vasectomy is a simple operation, which takes about 15 minutes. It can be done at a family planning clinic, a doctor's surgery or a hospital.  It is usually done under a local anaesthetic. This means you are awake but have an injection into the skin so that you do not feel pain. Sometimes vasectomy is done under a general anaesthetic.

In no-scalpel vasectomy:

  • Local anaesthetic is injected into a small area of skin on either side of the scrotum above the testicles (testes).
  • The doctor feels the tubes under the skin and holds them in place with a small clamp. 
  • They then make one tiny puncture with a special instrument. The same instrument is used to gently stretch the opening so the tubes can be reached.
  • The tube is brought to the surface through the small opening. Different doctors use different techniques, but all are designed to ensure the two ends of the cut tubes remain separate.
  • The second tube is treated in the same way through the same hole. There is very little bleeding with this technique.
  • No stitches are needed to close the opening, which heals quickly without leaving a scar.

Will vasectomy affect my sexuality and sex drive?

No – you hormones and 'maleness' will be the same after a vasectomy as they were before. Your sex drive and ability to have sex will not change. You will still have erections and orgasms. You ejaculate about the same amount of semen but it no longer contains sperm. The only change is that you cannot father a child. 

Possible complications

For the most part, vasectomy is a safe procedure with very few complications. Most men have no problems after a vasectomy, however:

  • there is a small risk of a wound infection after the surgery
  • bruising around the operation site may occur but it will go in a week or so
  • sometimes sperm may leak into the scrotum and form a swelling which may need treatment
  • you may experience a dull ache in the scrotum for a few weeks or months after the operation. This usually settles within three months

Learn more

Vasectomy NZ Family Planning

Credits: Editorial team. Last reviewed: 10 Nov 2015