So, would you say that your dividing line falls at the point in development where implantation would occur, even if the embryo is being developed without implantation?
If so, I guess this makes a certain amount of sense. At the point of implantation, a large majority of implanted embryos will grow and be born. Something that derails the process at this point is more the exception than the norm.
I don't happen to share this view, as I have explained before. But it does make a certain amount of sense.