I personally find, that it is better to read as much informations as you can.Continue asking the FS questions depending on your health conditions and how can you improve the next time round.
I have Dr H Smith and he have asked that I try something different and also recommend that I have lap and hyst done. That's when they found out that I have mild endo.
WFC only do the standard 2-3 days transfer unless you ask. I have always ask for blastocyst transfer after failing my 2nd cycle. Each time I also request that they transfer back two. You will need to fill in a request forms.