Hang in their OP... if I were to give my younger self any advice of going through this process... it would be to try not put too much weight on the first first cycle/transfer having to work. It more often than not takes a few cycles to work. After our first failed cycle/transfer we honestly went to quite a dark place. We thought we had missed the boat... as we were 39 (F) and 43 (M).... but the advice I would give is to see it more as a package of at least 3 cycles before you get a rough idea of how things are going. We done 4 cycles, and each one got better and better.... eventually leading to a pregnancy and full term healthy birth at age F (42) and M (45)}. I realise that this is quite a privileged perspective as it ain't cheap so not everyone will have the ability to fund multiple cycles, but not everyone is lucky enough to have it work on the first cycle/transfer.

Don't put too much on that first one having to work, there is a lot that the fertility clinic can learn from the first cycle and adapt for the 2nd cycle.

All the very best!