I don’t understand why the right to kill a child stops at birth. A minor child is still the onerous responsibility of its parents. Perhaps the only difference between killing a child before and after birth should be that the father gets to also make the decision from birth to majority or emancipation. Where is the logic in limiting legal child murder to pregnancy? I suspect it is all based on what is politically viable. And that will change as the society becomes more Progressive.
Look for legally killing people at the other end of life as they are inconvenient, and well, we’re pretty clear on how we value people with Down’s syndrome, next, autistic kids...golly, the potential in magnificent. The trend truly is to make these politically viable, like you say.