Thank you very much for your post. I find myself in the same boat, and nobody gives me a possible explanation. I am a very high responder, and nothing makes it to freeze.
IVF #1: 27 eggs retrieved, 22 mature, 16 fertilized, two good quality blastocysts transferred on day 5, none frozen. It was a real shock because I remember the embryologist telling me the day after retrieval "16 of them have fertilized...they look very good". Four days later, he announces before transfer that I only have two good ones for the transfer. It was a chemical pregnancy.
Last month we began IVF #2. My FSH level was 5. I had 31 eggs retrieved, 17 mature, 10 fertilized and transferred 3 grade A embryos (8-cell) on day 3-- none frozen. I found out that I had nothing to freeze when I called day 6. The embryologist said that "they stopped growing this morning". Yesterday we learned that I am not pregnant.
This last time they stopped growing day 6 in the morning! Of course, the first thing that comes to my mind is the egg quality, but what bothers me is that they look fine all the way until last minute.
Again, thank you for your posting.