It’s self-evident that the child in the womb is an individual human person. And so the law protects them. Lawless officers of government ignoring what is as plain as the nose on your face doesn’t change that fact.
Once it is viable outside the Mother's womb, I would agree. Prior to that, it cannot survive and cannot be considered wholly as an individual. It is certainly human and murdering it should certainly be a crime.
That is why the Amendment works better than a simple definition change.