Success rates

The first question most people ask when choosing a fertility clinic is, “what are their success rates?”


However, this isn’t a straightforward question to answer. Success rates can be presented in many different ways. Traditionally, the HFEA has used “live births per cycle started” to represent success rates. However, this does not take into account that some women may not complete their cycle of IVF – their cycle may be cancelled before they have an embryo transferred.


We feel that a more meaningful way to present success rates is by using “clinical pregnancy” or “live birth per embryo transferred”, or even “implantation rate”, which is the number of embryos that implant as a proportion of embryos that are transferred. At Jessop Fertility we are passionate about treating you safely, which means doing our best to provide you with a single, healthy pregnancy. We can do this best by transferring your embryos One At A Time, if it is appropriate - in 2016 over a third of our patients chose to have a single embryo transferred.


We are proud to present our latest clinical pregnancy results below. These results take account of all our patients who had IVF/ICSI from January to the end of June 2017. Also – we don’t just perform IVF at Jessop Fertility. Many of our patients have intrauterine insemination as a first course of treatment. Not suitable for all patients, this is safer and cheaper than IVF, and many of our patients will become pregnant using IUI rather than proceeding straight to IVF.

  • Clinical pregnancy rate per blastocyst transfer (under 40 years old) = 50.4%. A blastocyst is an embryo that is 5 days old. Culturing embryos to this stage can help us select the ones most likely to make a pregnancy.

  • Implantation rate per embryo transferred = 31.6%. This means that approximately 1 in every 3 embryos that we transfer does implant into the lining of the womb.

  • Cleavage rate = 96.9%. Because we use the best in human IVF culture media and cutting edge laboratory equipment, every egg that fertilises at Jessop Fertility has over a 96% chance of developing into an embryo.

We encourage all of our patients who are likely to do well to have their good quality embryos transferred one at a time, with "spare" ones being frozen using the most up-to-date techniques available.

  • For the first 3 months of 2017, just under 50% of frozen/thawed embryos resulted in a pregnancy.

This means that having a single embryo transfer, with freezing of good quality spare embryos, gives you the best chance of a healthy, singleton pregnancy.


At Jessop Fertility we are always striving to improve outcomes for all our patients. We provide a full service – from initial fertility investigations, through treatment, early pregnancy and beyond. Please contact us if you would like more information.