Hi Katy

I don't know WHY it happened, but the exact same thing happened to me as well. The first IVF cycle was a down reg (didn't use orgal) and went quite well apart form not falling PG - 2nd cycle the tried the protocol with orgal, and I O'd days before I was supposed to (I normally have short cycles). So it just doesn't work for some people. They will change your protocol accordingly. Hang in there, I got PG the next cycle when once again everything went wrong - they cancelled the IVF, but tried an IUI as a last resort and miraculously it worked.

Good luck