cquag wrote:after having 4 failed FET's after a successful fresh transfer, I just found out they were frozen on day 6. I'm disappointed b/c from what I've read if it takes embryos 6 days to reach blast instead of 5, then they aren't very good. Is this true? I am so mad that I did 4 transfers and spent $10,000 and I'm still not pregnant.
It seems it does not matter so much for an FET cycle, and day 6 do just as well as day 5. So say several reports.
Fresh cycles are another matter. It's pretty universally agreed that rapid embryo development is important in a fresh cycle.
One theory for why this occurs is that the endometrial receptivity may be advanced by ovarian stimulation. Hence the fast ones tend to implant after stimulation in fresh, but in an FET cycle it matters less or not at all.
Short answer: You're doing fine.