I've just found out that at Day 3 our 3 embryos are only 4 cells. Our clinic ONLY does Day 5 transfers and they have pretty much told me that unless they do some serious catching up, they won't be doing a transfer. This has of course left us devastated and crying all day. They can't understand what is going on, we are young (in our 30's) sperm looked good and so did eggs, they just won't grow quick enough. I'm wondering if anyone here had some slow starters? They told me they will call me in 2 days and let me know if we are having the transfer or not. I am so sad. This is our first cycle and we can't afford another. I don't know what to do.