Very interesting how they are doing it. When I batched, I grew mine to day 5/6 and they had to be hatching blast, then they did the biopsy and then they froze it. Then I did another cycle, same thing, but they added in the biopsy to the ones in my second cycle.
How are they going to test your embryo? Unfreeze, grow, biopsy and re freeze? Sorry for the questions, just trying to understand.
I think with the cells it is also really hard to see day 2, as they could be 4 cells or they got it just that bit later and there are more. If they were able to freeze it, I wouldn't worry xoxo