This is my first round of IVF. I had egg retrtival on Friday (Oct 24), and they got 9 eggs, 7 which fertilized. I was planning on having PGD testing, and they asked if I would forgoe this if some of the embryos looked as if they were not going to continue to grow for a day five transfer. How many good embryos are needed for PGD testing, and why would they ask me if a Day 3 transfer was out of the question if they didn't already know something. I am confused.