Since the transition is more-or-less random and unpredictable, it can be assumed an act of God that killed it...
To address your "act of God(that you don't believe in)" bit, if the embryos are human lives, don't we have the same duty to protect them as we would a newborn? If I toss a baby out in the snow, can I claim that the near certain eventual death was caused by an act of God rather then my heaving him out into the snow?
>>”...and worst of all, lost to that “8-year old” <<
And with the deluded ego of an 8 year old too!