Hi joeyme, firstly goodluck with your first cycle! To me that sounds a bit strange that they don't do a blastocyts transfers unless they collect 20+ eggs because well firstly i dont think very many ppl get anywhere near that number. When i had my stim cycle i had 15 eggs collected and was told that was an excellent result as lots of women only get around 6!! and out of my 15 only 10 fertilised then only 4 made it to the blastocyts stage (1 transfered and 3 frozen). My FS told me that if they dont make it to the 5 day blastocyts stage their not viable to transfer or freeze. But some women on here have said they have had day 3 transfers so i guess other clinics are different? Your question about transfering 2 embies, my clinic only transfers 2 if your over 35 i think or if you have had 3 failed attempts then they upgrade you to having 2 transfered. Maybe consult your FS about this if you have concerns. I hope i havn't confused you iv just never heard of that because as far as i know they like them to get to the blastocyts stage because that indicates a good start to a healthy embryo that has all the right DNA??? But i could be wrong. Don't get too down if your first attemp dosn't work, some women are really lucky and the first one sticks but for most women it takes roughly 3 attempts for a sucessful transfer. Again goodluck and sending lots of baby dust to you xx