And not without implantation, it doesn’t either. Or a placenta. Why isn’t implantation the measure of when humanity starts? Or when the heart begins to beat? Or when the neural tube forms? Or any host of biological
necessities that need to take place for a human baby to develop and live?
The reason: divine revelation.
A unique, new human life starts at conception. Outside of theological reasoning, isn’t this a good marker of when to call it human life? It sure isn’t any other kind of life.
No reason, aside from wanting to avoid association with the mocking song “every sperm is sacred,” since it takes away from my point.
Thanks. I’m guilty of seeing some humor in that song.
Which is that
the notion that an embryo deserves the same protection as a human being is not self-evident from the natural moral law alone. Without recourse to divine revelation, you have no grounds to criticize someone who believes that a human life doesn’t start until the fetus starts to make its own red blood cells, and you have no grounds to criticize someone who believes that trillions die every day inside testicles.
Well, it seems we disagree on what and what is not self evident.
This stands in contrast to murder, and other crimes that offend the natural moral law, and can justify calling someone who unrepentantly does them “evil.”

What is the difference in terminating a three-month old embryo and a month old baby, in your view?