The idea that ICSI should be used for all IVF cycles is held by some of my colleagues. The article will debunk the reasoning behind this, by providing rational arguments for the preferential use of conventional IVF (cIVF). Some of the risks associated with ICSI will be highlighted, all of which are eliminated by the use of cIVF. A simple mathematical model will be provided that shows, via use of benchmark KPIs, how more fertilised oocytes can result from cIVF compared to ICSI. This will then be backed up with evidence from studies showing that there is still no data to support the routine use of ICSI for non-male factor infertility. More worryingly, there is now data to show that ICSI actually decreases the chance of success compared to cIVF. Finally, the additional costs associated with providing ICSI will be revealed, showing the vast amount of money that is paid to clinics for patients to access ICSI treatment, when cIVF would have offered them a better chance of conception.