@Kate1985 ring the FN and ask her why. They did that with me last cycle because I only had 3 embryos at day 3 and there was no need to select them out as I was transferring all 3. Usually they just put them back if you have small numbers as its better to not put them through 5 days if its unnecessary. Don't be afraid to question treatment decisions and find out more when u need to.
@blossom1 the main difficulties with twins in older ladies is low birthweight, not prematurity,.. they actually carry the babies for longer for some reason. This was the article on which I based my own decisions about embryo number given this is my 4th cycle. One should note this study was for cleavage stage embies, *not blasts*... But it raises some interesting points anyway ...
@sunshinechai .... Good luck for transfer