I got the call with our fert report this morning. While it wasn't the "you have 8 perfectly fertilized embryos" that I hoped for, we are still better than last cycle. Out of the 8 eggs retrieved, 7 were mature, and out of the 7 mature, 4 fertilized normally and they are watching a fifth. So right now we have 4 or 5 fertilized embryos. At this point last cycle, we had 3 embryos.
My clinic only does day 5 or day 6 blastocyst transfers. There are two schools of thought when it comes to deciding when to transfer embryos. One side feels like the embryos will do their best in a natural environment, so transfer on day 3 to get the embryos into the uterus ASAP. This camp may push transfer to day 5 if there are enough embryos that they are confident that some will make it to day 5. The other side of the coin is that waiting until day 5 gives you the best chance for success because most aneuploid embryos will stop growing before then. It is any easy way to weed out some the bad embryos, so that your odds of transferring a good embryo are higher. My clinic falls into the latter category.
The hardest part of being pushed to a 5 day transfer is knowing that there is a chance that none of the embryos will make it to blastocyst and you will have nothing to transfer. I can tell you from experience that going through all of the meds, injections and retrieval only to not even have a chance at success sucks. I just want to make it to transfer this time, I want a chance at getting pregnant.