thanks murraycod that's interesting because the clinic were intially going to freeze mine day 2 but decided on day 1, their theory was they will thaw better if they hadn't started to divide, or rather if they had divided they might lose a cell or 2 in the thaw and then that would put them behind because they need them at a certain level (6-8 cell) on day 3 for the pgd and then they would also be behind in growth than what they like on day 5