How common are pregnancies after vasectomy reversals?

pregnancy after vasectomy reversalYou might think that once you’ve gone under the knife and had a vasectomy, that’s the end of the road, but more and more men are changing their minds and opting for a vasectomy reversal in order to try and conceive – with excellent success rates. People want to find out how to become pregnant after a vasectomy reversal.

The procedure 

A vasectomy reversal with Mr Harriss is performed through a single scrotal incision under general anaesthetic, after which he finds the ends of the vas deferens, a small tube in the male reproductive organ that carries sperm. He joins the ends severed in a vasectomy using the single layer technique, and rejoins both sides, allowing the patient the greatest chance of conceiving after the operation.

Sperm motility

Sperm motility is the ability of sperm to propel themselves and move properly through the female reproductive tract and it too can affect fertility. Recently published research has shown that three months after a vasectomy reversal, couples practising unprotected sex where the sperm has less than 20% motility have a 19% chance of falling pregnant within two years, while those couples where sperm has over 20% motility have a 53% chance of becoming pregnant. For comparison, in a normal population (non-vasectomy), for most couples trying to conceive the odds that a woman will become pregnant in any particular month are about 15% to 25%.

Reversing a vasectomy doesn’t guarantee that pregnancy will follow, and anti-sperm antibodies are rumoured to be counter-productive to conception. Our experience is that men with high levels of antibodies can and do have conceptions. They don’t rule out the possibility of a pregnancy, in our opinion the jury is still out on the role of anti-sperm antibodies as we have documented pregnancies with varying levels of anti-sperm antibodies.


Research shows that anxiety does have a role in preventing conception. Recent research shows that there is a 12% increased risk of pregnancy not happening. The University of Oxford and the US national Institutes for Health identified a marker for a stress hormone called alpha amylase which was found consistently higher in women who had trouble conceiving. We have found, anecdotally, that those who continue with their lives or are in  position where they are too busy to worry, often conceive.

After a vasectomy reversal, couples can choose to have a semen analysis done after three months, in which a sample is taken in our WHO accredited semen analysis suite to analyse the sperm’s motility and anti-sperm antibodies, and establish the likelihood of falling pregnant.

The Vasectomy Reversal Centre

In his extensive experience at the Vasectomy Reversal Centre in Nottingham, Mr Harriss has seen many patients go on to have children as a direct result of undergoing a vasectomy reversal. You’ll be pleased to hear that vasectomy reversals can be so effective that some couples don’t make it to the three month semen analysis, having already conceived! Contact us today for more information.