Gestation Calculator

This calculator has been designed to give you an idea of the treatment options available to you*. If you decide to have an abortion with Marie Stopes UK, one of our nurses will give a more approximate gestation date during your appointment by way of a scan.
*Please note that this online calculator will only give you an estimated gestation based on the details you have provided.

Please select the first day of your last menstrual period.



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What is a vasectomy?

Vasectomy is the common name for male sterilisation. It's a popular method of family planning chosen by millions of men worldwide. It's safe, effective and offers a permanent solution to contraceptive needs.

Vasectomy is a simple procedure where a surgeon seals the sperm-carrying tubes (called vas deferens) to prevent sperm entering the fluid which a man ejaculates. It takes about 15 minutes, and is one of the most effective methods of contraception that exists - the failure rate is approximately 1 man in 2000. After a vasectomy the testicles will continue to produce sperm as normal, but the sperm cannot enter the tubes and is simply absorbed into the body. You will still form an ejaculate after a vasectomy, but it will not contain sperm.

There are two methods of vasectomy: cautery and cut & tie. Marie Stopes United Kingdom provides the cautery method only as it offers faster recovery, and is just as effective as cut & tie. A cautery vasectomy is performed as follows:

  • A fast acting local anaesthetic is given before the procedure, which numbs the area. General anaesthetic will not be available.
  • A small incision is then made in the scrotum to locate and heat seal the vas deferens (sperm carrying tubes). The incision is very small and no scalpel or stitches are needed, except in very rare cases.
  • The small incision is then protected via a dressing and the procedure is complete.

Male sterilisation advantages

  • Vasectomy is a permanent solution.
  • Having a vasectomy has no effect on your hormones, orgasm or ejaculation so there's no reason why a vasectomy should affect your sex life.

Things to consider 

  • Only choose sterilisation if you do not want children or have completed your family. We do advise that anyone under the age of 25 has counselling before proceeding
  • Unlike condoms, male sterilisation offers no protection against sexually transmitted infections.
  • The incidence of infection is rare. However it is always a possibility after any surgery but is easily resolved with antibiotics from your doctor.
  • A very small number of men (1 in 2000) have been known to experience long term testicular pain following a vasectomy, which may require follow-up treatment.
  • There will be a short recovery time after your operation, during which we advise you follow our vasectomy aftercare advice. You will need to care for your wound and refrain from strenuous physical activity for at least two weeks. 

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