Does anyone know the difference between having a day 2 ET/Fz and day 5? I was at one clinic. Had 15 eggs collected, 10 fert. Day 2 ET and 5 embryos frozen. I had to come back for 5 different thaw cycles. All unsuccessful. I changed clinics. Here they do mainly day 5 ET's. I asked my FS what the difference is. He said it helps them select the better quality embryos to transfer and freeze. He said therefore helps patients get pregnant quicker because they are not 'wasting' their time with poor quality embryos. Is this right? If so, why did the other clinic not do this? I feel like I've completely wasted a lot of time and heaps of money with embryos that never had a chance.