This has been bothering me today. How exactly does the embryo not just fall out after being implanted in the uterus? I think I would be scared to cough, or stand upright, or ANYTHING in case I lost it.
Also, when the RE puts the embryo back, can they see it on a scan? I know it's mircoscopically small, but thought they might be able to see the liquid it is in, to see where it lands?
Also, why does it not work sometimes? For instance, if you put back a Grade A embryo and it didn't stick, what could be the possible reasons for that?