@Tahli Right you are Luv, am making a note for Thursday on the whiteboard!!!
I don't think it takes all that long to thaw an emby does it?? Oooh...I just found this:
The cells (embryos in this case) are stored in liquid nitrogen after a controlled freeze by special machinery. Embryo freezing takes several hours while the thaw process takes about 30-45 minutes. Embryos have been successfully thawed after cryopreservation for as many as 13 years.
Embryo Freezing at the Genetics & IVF Institute
Soooooo....with that in mind, if you asked for an afternoon transfer, then you'd have the morning to thaw the embryo's out one at a time if you needed to??? If you're going to transfer 2, then they could thaw 2 out in the morning and give them a wee bit of time before transfer to see how they re-expand and then if 1 isn't going so well, they could thaw out the other if you wanted them to couldn't they???