[coleren]

I underwent FET today and when my blastocyst was frozen originally, it was graded as an A. (that's all the info I got, just A, no numbers or second letters). Today when it was thawed, it was graded a C. What does that mean? Why was it an A before freezing and now it's a C? Does anyone know? What are the chance with a C? They hatched it for me. Any ideas?

[coleren]

just bumping to see if this has happened to anyone else.

[ImHis]

we adopted 8 grade A blasts. Out of the first 4, 2 didnt malke the thaw and 2 ended up being C grade as well. Somewhere in the freezing they became fragmented. Sorry to say for me it was a BFN.
The next 4, 2 didnt make it, two did, they looked great and I am now pregnant with a singleton.
I dont know all the science but I just thinkt hat sometimes they dotn do well being frozen and or that sometime in the freezing process little crytals form that make them fragmented.
I hope you will still get your BFP.. my RE said he has seen it happen just as much as with great embies.