if it were me, i'd go the IUI option. Yes, there is no "knowing" that fertilisation has occured, but, there is a chance you could go the expense and the physically harder procedure of EPU and not have fertilisation occur anyway. i would go IUI, and hold onto the hope that it will succeed. if you're unfortunate enough to have it fail, push with your FS for a higher dose or a different protocol for higher follie count

good luck with whatever you decide

BG