here's what the latest science seems to says: fast dividing cells on day 3 have a high likelihood of dying because a large proportion (80% I think) are chromosomally abnormal. So fast-dividing embryos are a cause for concern. For this reason, fast-dividing embryos have traditionally been avoided, and deliberately not implanted unless there's no alternative. So that's the bad news. Here's the good news. A recent study in 2008 took a closer look at fast-dividing embryos, to find out more about them. It turns out that although fast-dividing embryos are more likely to not survive beyond day 3, those that DO survive to day 5 end up being the very best embryos overall - even better than the normally dividing ones. In other words, they're the best so long as they can get thru the 'likely-to-die-early' stage. So if your IVF clinic is automatically excluding fast-dividing embryos, they should read this recent research, by Luna and colleagues (2008). hope that helps.
My DH and I had our transfer 4 days ago. The lab tech that came in told us on day 3 they want to see the embyros between 6 and 9 cells. We had two transferred, one was 8 cell and the other was a 9 cell. But really who knows, as far as the reading I have done appears each lab grades the embryos differently too.
I thought the more cells embryos has the better...
notsure- I had 2 early misses and they think it was progesterone,,this cycle we r doing oil shots and suppositories!
I read that 6-10 cells is good for day 3. I am not sure what it means if there are more - maybe nothing - it's just dividing slightly higher than average??
Don't want to impose, but did you ever discover why you miscarried? Good luck this time around.
we transferred a 6 cell and 9 cell,,,i read the same as u and never got an answer..we miscarried early and are on ivf 2 . good luck!