For patients having IVF, the average fertilisation rate at Bourn Hall Clinic is around 60%. Some people will exceed this, and for others the percentage will be lower. Unfortunately, for a small number of patients, no eggs will fertilise.
If you are having ICSI, the average fertilisation rate is 65% of those eggs that were suitable for ICSI. It is possible that none of your eggs will fertilise, but this is rare.