Is There a Lesser Penalty for Unintentionally Trigging a Miscarriage That We May Intentionally Abort?

The shedding of innocent blood, meaning the intentional killing of an innocent human being, is strictly forbidden. The science of embryology is very clear that from the one cell stage, you were a distinct, living, whole human being. So i just don't believe exodus 21 is a good way to argue for abortion at all. But secondly, the passage doesn't prove what critics think it does. Let's go ahead and say they're right, that there is a lesser penalty for harming the fetus than harming the mother in a minute.