Pickle - I'm so pleased to hear from you, thanks for the congrats! I want on the early pregnancy chat but no-one is there, - also it's miserable, there are lots of people with lots of early losses, which I'm trying to avoid thinking about.
I know Reprofit didn't work out for us, mainly becuase we didn't have any that grew past d3 with them, even if they looked perfect on d3. I tried to talk to them about early transfer of the best ones, but they wouldn't bank them. I think their Lab handelling is not very gentle, for example Serum never 'clean' the egg - they don't want to mess about with it if it is not necesary, Reprofit do it immediately to examine the maturity of it. Serum's sperm selection also means we don't need ICSI, as just a couple of thousand of the best sperm are allowed to compete to fertilse naturally.
I know for me the degree of fragmentation and evenness of cell sizes etc on d3 is the best prognostic indicator (for us). For some reason the most sucess we have had has been with d3 embryo's - both Create and Serum recomend it for people who the embryo's struggle to make it to blast. I know this increases the chance of early losses, but for us there isn't really another viable way, and I think our embryo's do better on the inside anyway. I'm sharing this because it might be similar for you now.