Treatment guide
Vasectomy
Also known as: Male sterilisation, No-scalpel vasectomy
In brief
A vasectomy is a minor procedure that provides permanent male contraception by dividing and sealing the vas deferens, the tubes that carry sperm. It is usually done in under half an hour under local anaesthetic, and does not affect testosterone, erections or the sensation of orgasm.
Medically reviewed by Dr. Atip Chatsudthipong, MD on
Written by Editorial teamPublished Updated
What is a vasectomy?
During a vasectomy, the two vas deferens — the tubes that carry sperm from the testicles — are divided and sealed so that sperm can no longer reach the semen. The testicles continue to produce hormones normally, and semen looks and feels much the same, because most of its volume comes from other glands.
Vasectomy is one of the most effective forms of contraception available, and is simpler and safer than female sterilisation.
Is a vasectomy right for me?
A vasectomy is intended to be permanent. It suits men who are certain they do not want to father children, or more children, in the future. A consultation covers your circumstances, your partner's views if relevant, and alternatives before you decide. Some men choose to store sperm beforehand.
What are the benefits of a vasectomy?
- Highly effective — once a semen test confirms clearance, it is one of the most reliable forms of contraception
- Permanent — no ongoing cost, hormones or day-to-day effort
- Quick and minimally invasive — a short outpatient procedure under local anaesthetic, usually without stitches when the no-scalpel technique is used
- Fast recovery — most men return to desk work within one to two days
- No effect on hormones or sexual function — testosterone, erections and orgasm are unchanged
- Simpler and lower-risk than female sterilisation, which requires abdominal surgery under general anaesthetic
How is a vasectomy performed?
- Local anaesthetic numbs the scrotal skin and the vas deferens; light sedation can be added if you prefer.
- Each vas is reached through a tiny opening in the skin.
- The vas is divided and the ends are sealed, for example with cautery and/or clips.
- The opening usually heals on its own without stitches.
The procedure typically takes 15–30 minutes and is performed as an outpatient, so most men go home shortly afterwards.
What is the difference between no-scalpel and conventional vasectomy?
| No-scalpel vasectomy | Conventional vasectomy | |
|---|---|---|
| Access to the vas | A single tiny puncture made with a fine instrument | One or two small incisions with a scalpel |
| Stitches | Usually none | Often a few dissolvable stitches |
| Bleeding, pain and infection | Generally less | Generally slightly more |
| Effectiveness | The same — both are judged by the follow-up semen test | The same |
The AUA guideline recommends minimally invasive access techniques such as no-scalpel vasectomy because they are associated with fewer complications. How the vas is sealed matters more for effectiveness than how it is reached.
How effective is a vasectomy, and when can I rely on it?
A vasectomy is not effective immediately
Sperm remain further along the reproductive tract after the procedure. Keep using other contraception until a post-vasectomy semen analysis — usually 8 to 16 weeks afterwards — confirms that it is safe to stop.
Once the semen test confirms clearance, vasectomy is highly effective. Rarely — in about 1 in 2,000 men after clearance, according to the AUA guideline — the tubes can rejoin (late recanalisation) and pregnancy can occur.
What is recovery like after a vasectomy?
- Mild discomfort, swelling and bruising for a few days — eased with cold packs, supportive underwear and simple pain relief
- Most men return to desk work within one to two days
- Avoid heavy lifting, strenuous exercise and sexual activity for about a week, or as advised
- Keep the area clean and dry for a day or two
See the full vasectomy recovery guide.
What are the possible complications?
- Bleeding or a collection of blood in the scrotum (haematoma) — uncommon
- Infection at the puncture site — uncommon
- Chronic scrotal pain — the AUA guideline estimates that about 1–2% of men have pain severe enough to need medical attention
- Sperm granuloma — a small, usually harmless lump where sperm leak at the sealed end
- Failure due to recanalisation — rare, and the reason the semen test is essential
Does a vasectomy affect sexual function or health?
| Misconception | What the evidence shows |
|---|---|
| It lowers testosterone | No — the testicles keep producing testosterone, which enters the blood, not the vas |
| It causes erectile problems | No — erections and orgasm are not affected |
| Semen will look different | Volume and appearance change very little; sperm make up only a small part of semen |
| It increases the risk of prostate cancer or heart disease | The AUA guideline does not consider vasectomy a risk factor for either |
| It protects against STIs | No — condoms are still needed to prevent sexually transmitted infections |
More in Does a vasectomy affect testosterone or sexual function?
Can a vasectomy be reversed?
Vasectomy reversal is possible with microsurgery to reconnect the vas (vasovasostomy) or, in some cases, to connect the vas to the epididymis (vasoepididymostomy). Success becomes less likely as the years pass after the vasectomy, reversal is more complex and costly than the original procedure, and it does not always restore fertility. Assisted reproduction with sperm retrieval is an alternative. For these reasons, a vasectomy should be considered permanent.
When should you contact a doctor after a vasectomy?
Seek medical advice promptly if you develop:
- Rapidly increasing swelling or a large, painful lump in the scrotum
- Fever, redness or discharge from the wound
- Pain that is getting worse rather than better
Vasectomy with Dr. Atip
Dr. Atip performs no-scalpel vasectomy as an outpatient procedure at the Urology Center of Bumrungrad International Hospital, under local anaesthetic or with sedation, according to your preference. Consultations are private and unhurried, with time to discuss whether a vasectomy is right for you, what to expect, and how follow-up semen testing is arranged.
Frequently asked questions
What is a no-scalpel vasectomy?
In a no-scalpel vasectomy, the vas deferens is reached through a tiny puncture in the skin instead of a cut. The opening is so small that it usually heals without stitches, and the technique is associated with less pain, bleeding and infection than a conventional incision.
Does a vasectomy affect sex drive or erections?
No. A vasectomy does not affect testosterone levels, sex drive, erections or the sensation of orgasm. The volume and appearance of semen change very little.
How soon can I return to work after a vasectomy?
Most men return to desk-based work within one to two days. Jobs involving heavy lifting may need a little longer — your doctor will advise.
When can I stop using other contraception?
Only after a post-vasectomy semen analysis, usually 8 to 16 weeks after the procedure, confirms that no sperm (or only rare non-moving sperm) are present.
Can a vasectomy be reversed?
Reversal is possible but involves more complex microsurgery and does not always restore fertility. Vasectomy should be considered permanent.
References
This information is for general education and does not replace a consultation with a qualified doctor. If you have severe symptoms, seek emergency care (in Thailand, call 1669). See our medical disclaimer.