FET scheduled for May

Ta

Eggs Retrieved: 21

Eggs Fertilized: 17

Grading at Day3:

5A

5B

7C

My doctor seemed disappointed with this and has decided to freeze all the 5A ones and try and see if the remaining reach blastocyst and then take a call on freezing more. She thinks in May when we thaw we can expect only 1 or 2 from the A grade embryos to reach blastocyst.

How do these numbers looks? I'm personally feeling very disappointed..