thanks very much everyone for your replies - always SO wonderful to log back in and see that somebody has been in a similar experience. WE are lucky to have this forum.

Las - we are going to grow the embryos to blast stage this time (5 days) assuming it all goes well up until then. Previously we did 2 day embryos and the quality was highest grade and one at a time. Now it will be 2 at a time because of my age (38).

brissy's girl - if you see the thread about, let me know, it would be good to read it.
Lucia - wow - that is a positive note - thank you very much.