Can natural conception occur day before egg retrieval

Hi..I had unprotected sex the day before egg retrieval ans managed to have a successful IVF embryo day 5 transfer that resulted in a pregnancy....is there any way this pregnancy could have resulted through natural conception or was it definitely achieved through the embryo transfer
Thanks

Our Expert's Answer

This information was published 1 year, 11 months ago and was correct at the time of publication. It may not reflect our current practices or regulations.

Please note that all the answers we give are on a generic basis only, as we cannot provide more in-depth answers without access to your medical history. If you need a more detailed response, tailored to you, we would recommend a consultation with one of our Fertility Specialists for more comprehensive medical advice.

The answer is yes, there is a possibility that natural conception could have occurred, but bearing in mind the reason for your infertility, if it is a tubal factor or low sperm count it would be very unlikely.