After my unsuccessful IVF cycle, I had to have a break cycle before my FS would let me do my FET cycle ... I can't remember exactly, but I have a feeling that I ended up taking provera to get my 'break' cycle to be a normal length (but then again, they weren't normal length before IVF), and then started jabbing with Puregon again for my FET cycle (but didn't have to do the Synarel again, thank goodness!).

Are you doing a natural FET cycle?