Once the embryos have been transferred into the uterus, we have no ability to check what happens inside the uterus. All we know is that human reproduction is not a very efficient process, and that most embryos will not implant because they have genetic abnormalities we still cannot test for. This is the limitation of IVF technology today, and we need to come to terms with it.
This was my answer to her.
No, there's no need to change anything, since it was a perfect cycle ( top quality blastocyst, excellent endometrium, easy transfer)
The problem is that human reproduction is not perfect !