Good policy is not necessarily the right thing to do. What is the slippery slope that traps the human race if it agrees to kill what it knows to be human life?
Getting God’s perspective correct is the first order of business, as I see it.
We then build our policy DESPITE the difficulties it might cause.
I have argued in the past exactly as you are now: prevent implantation and you have not killed a human.
But what if it is a fact that only truly living joinings of sperm and egg are those that implant?
One thing we have learned is that the contraception generation has come to believe that it determines who lives and who dies. That was the slippery slope.
And that is the logic of the Health Care philosophers who dreamed up the death panels.
That's it.