Boo, it seems there are a few different ways of attacking an IVF cycle!
I wasn't given an option, I was just told I had to start the pill on day CD2. I then started Synarel around CD10 and then injections a couple of weeks after that. The whole thing was about 5 weeks from start to EPU and then of course the TWW after that.
Your cycle sounds much quicker! May have to ask about that option myself I think!