Krikkit, for IVF I'd calculate the due date assuming EPU was the ovulation date. Since I don't have a 28 day cycle I've always calculated it based on O day rather than LMP... I'm doing the same this time too - I O'd CD17 or CD18... FF has a due date calculator. Not sure if it's a VIP function? If it is I'd be happy to run your EPU date through it for you next time I log in and see what it says...

BOC, fyi, not always 3 or 5 day transfer - my first two fresh cycles were 2 day transfers...