Thank you Irex, Mrs. Sx2, and Fried. We're still trying to make sense of all of this, turning unfortunately, to numbers. We were told by the RE that we had well over the statistical average of 60% success rate for a live birth given that we were transferring two very good five day blastocysts. DW is super healthy, lean, and while a bit older (38 years old), we were using my younger (31) year old eggs. Plus, we were transferring fresh (not frozen) blasts into her un-egg-retrieval-traumatized body. We still can't make sense of why it didn't work, but figure that nature was doing its own short-listing, and that maybe there was something wrong with the embryo. We know people who have had miscarriages later in their pregnancies, and are relieved for this to happen now, rather than later.
Thanks for all of your support. We will take a little break until DW is cleared to try again, at which point we will transfer some of the frozen embies.