A no-scalpel vasectomy is a minor procedure performed under local anaesthetic in which the vas deferens — the tube carrying sperm — is divided through a small puncture rather than a conventional incision. It does not affect erections, ejaculation, or testosterone. Sterility is confirmed only by a post-procedure semen test.
A vasectomy is a permanent form of male contraception. “No-scalpel” describes the way the surgeon accesses the vas deferens through a small puncture rather than making conventional skin incisions; the tubes still need to be divided and sealed.
The most important preparation is certainty about permanence. Reversal is possible in some cases but is not guaranteed and is not a reliable backup plan.
Before the procedure
The consultation should cover medical history, medicines, family plans, alternatives, failure risk, chronic pain risk and the need for semen testing. Follow instructions about shaving, transport and blood-thinning medicine.
What happens on the day
- The scrotal skin is cleaned and local anaesthetic is injected.
- The vas is stabilised beneath the skin.
- A small puncture is made and each vas is brought through in turn.
- A segment is divided and the ends are sealed or separated using the surgeon’s technique.
- The puncture may need no stitch or a very small closure.
Vasectomy is one of the most effective forms of contraception available, with a failure rate of less than 1 in 2,000 after sterility is confirmed by semen analysis.
What does it feel like?
You may feel the injection, pressure or pulling, but sharp pain should be reported immediately so more anaesthetic can be given. Anxiety is common; a calm explanation and private setting help.
The first week
- Use supportive underwear and cold packs as advised
- Rest on the first day and limit strenuous activity
- Expect bruising, swelling or mild aching
- Use recommended pain relief
- Avoid sex and heavy exercise until comfortable and cleared
You are not sterile immediately
Sperm remain downstream after the procedure. Continue contraception until the laboratory result meets the required clearance criteria. Missing the semen test is one of the main avoidable causes of unintended pregnancy after vasectomy.
Risks to understand
- Bleeding or haematoma
- Infection
- Sperm granuloma
- Persistent scrotal pain
- Early or late failure/reconnection
- Need for repeat procedure in rare cases
Frequently asked questions
Local anaesthetic makes it tolerable for most men, but brief discomfort and post-procedure aching can occur.
When comfortable and according to the surgeon’s instructions—but continue contraception until laboratory clearance.
It does not stop testosterone production and should not directly impair erections or orgasm.
Usually not noticeably, because sperm make up only a small proportion of semen volume.
Sometimes, but success is not guaranteed. Treat vasectomy as permanent.
Speak to Mr Torath Ameen
If you have concerns about urological symptoms or would like an expert opinion, book a consultation at our London or Hertfordshire clinics.
This article is intended for general patient education only. It does not constitute medical advice and may not apply to every individual's circumstances. Clinical decisions should always be made in consultation with a qualified healthcare professional. If you are concerned about your health, please seek prompt medical assessment.