How is a vasectomy reversed?

Written by: Mr Nikesh Thiruchelvam
Published: | Updated: 09/04/2019
Edited by: Bronwen Griffiths

Vasovasostomy is a surgical procedure that reverses a vasectomy. Having a vasectomy is usually done as a form of contraception for men who want to prevent pregnancy occurring. It is a microsurgical procedure and takes a lot of skill. Mr Nikesh Thiruchelvam, a top urologist who runs a dedicated vasectomy reversal clinic, explains how vasectomy reversal is achieved.

Are vasectomies easily reversed?

I wouldn’t use the word easy! The vasa that are cut during a vasectomy are only 2mm in diameter and the lumen that carries the sperm is only around 0.8 mm on the prostatic side and 1.3mm on the testicular side. The testicular side dilates up after a vasectomy due to back pressure from seminal fluid that is trying to get through from the testis.

What is important is to have a skilled reconstructive urologist who has various reconstructive techniques up his sleeve to deal with all of the different situations that may arise and be encountered when performing a vasectomy reversal. The evidence would also suggest that performing a vasectomy reversal using an operating microscope yields better results than using the naked eye or using operating loupes (which are like magnifying glasses placed over each eye).

What does the vasectomy reversal procedure involve?

I perform this surgery with the patient asleep, under a general anaesthetic. The procedure takes between 1.5 to 2 hours. The general steps of the procedure are as follows:

  • The testis is brought out of the scrotum via an incision and the damaged ends of the vas are cut back to where the tissue has a good blood supply.
  • The vasal ends are sometimes cannulated or probed with an incredibly fine probe to ensure that the lumen or channel is patent.
  • The vasal ends are then sutured together using incredibly fine sutures or stitches (around one-quarter of the thickness of a human hair) which are permanent or non-absorbable. Using these type of stitches, which are incredibly fine, I can reconnect the small vasal tubes.
  • Using typical reconstructive techniques I ensure that these new joins heal without tension and with a good blood supply. Unlike some surgeons, both sides are operated on with two separate scrotal incisions.

How successful is a vasectomy reversal?

Despite the lower pregnancy rates, these rates are still a considerable improvement compared to published results with IVF. Most UK centres quote rates in the region of 30-35% pregnancy rates with IVF. Furthermore, unlike IVF, if you have a successful outcome with myself, you only pay the once to have more than one child should you wish for a larger family.

It can take up to a year for sperm to appear in the semen, but commonly, this will occur within a few months. There is a natural reduction in patency of the lumen over the years after a successful operation, of around 2-3% closure rate per year.

It is important to know that a successful outcome in producing sperm in the semen does not always lead to a successful pregnancy. Success rates are largely based on surgical expertise and time since vasectomy, in addition to general medical health issues, such as smoking or obesity.

If your vasectomy was less than 3 years ago, you have a 97% chance of getting sperm in the ejaculate (with a 76% chance of a successful pregnancy). This drops to 70% success if the vasectomy was greater than 15 years ago.

How long is the recovery period?

When you wake from surgery, you will have a scrotal support jock strap on. This will be covering the two separate scrotal incisions. As the incisions are quite small, there usually isn’t much pain that it is not well controlled by painkillers you can take orally. The majority of men have pain that is similar to, or less than when you underwent the initial vasectomy. The stitches are dissolvable and will fall away after a few weeks.

Some dos and don’ts:

  • You cannot drive yourself home after surgery as you will have had a general anaesthetic.
  • You should have someone stay with you overnight.
  • You can have a shower on the day after surgery.
  • You should avoid sitting in a hot bath for some months, as this can adversely alter sperm function.
  • After surgery, you may get some bruising and swelling in the scrotum but this usually resolves in the first week following your operation. As the stitches used to reconnect your cut vas tubes are very fine, it is important to undertake light duties only and not to undertake any rigorous physical activity for 2-3 weeks.
  • You should also refrain from having any ejaculations or sexual activity until six weeks after surgery.

It is important that you plan the date of surgery such that commencing light duties ties in with your work plans. Rest and healing are of utmost importance.

After about six weeks of healing, you can start trying to conceive for a child. It can take an average of one year for your partner to become pregnant, although it is not unusual for this to occur within a few months.


If you have had a vasectomy but are considering having it reversed, make an appointment with an expert to discuss your options.

By Mr Nikesh Thiruchelvam

Mr Nikesh Thiruchelvam is a highly-experienced consultant urologist based in Cambridge. He has a specialist interest in all aspects of urinary dysfunction and treatment, in addition to benign prostate enlargement, vasectomy, and reverse vasectomy. Mr Thiruchelvam is celebrated for performing the first Urolift procedure in Cambridge, and runs a specialist vasectomy reversal clinic using microsurgical techniques. He enjoys excellent reviews from patients praising his clear explanations and high level of care and attention.

Originally qualifying from St Bartholomew’s Hospital Medical College in London, Mr Thiruchelvam pursued specialist training at leading centres of urological excellence including St. Bartholomew’s, the Royal London Hospital, Ipswich Hospital and Great Ormond Street Hospital. Over the course of his career Mr Thiruchelvam has secured multiple fellowships to travel to the USA and Australia, studying cutting edge techniques in treating prostate enlargement and urinary incontinence. He completed an MD in London, and was appointed Consultant Urologist at Cambridge University Hospitals in 2009.

Widely published in textbooks, patient guides, and peer-reviewed journals, Mr Thiruchelvam is highly-regarded for his extensive knowledge in the basic science of urology as well as surgical best practice. He is a significant contributor to NICE consultations, NHS Horizon Scanning documents, NICE Eyes on Evidence and NIHR Design for Dignity. Internationally, Mr Thiruchelvam is a co-author to the European Association of Urology Guidelines for Urinary Incontinence, invited faculty of European School of Urology and is regularly invited to lecture at urology conferences abroad and undertake Visiting Professorships.

View Profile

Overall assessment of their patients

  • Related procedures
  • Sexually transmitted infections (STIs)
    Penis Enlargement (Phalloplasty)
    Adult circumcision
    Urologic Oncology
    Geriatric Urology
    Kidney transplantation
    Short frenulum
    This website uses our own and third-party Cookies to compile information with the aim of improving our services, to show you advertising related to your preferences as well analysing your browsing habits. You can change your settings HERE.