When an identical twin emerges from the initial zygote of conception, Science is not able to identify which of the first four to six to eight cells of the developing embryo is the actual one that is the zygote age of the twin. Does that help to see why this could actually be killing the twin in some instances? Or do you not consider the zygote age of the human lifetime to be worthy of protection as a human being in fact?
That is an interesting way to look at it. Bears consideration.