Now that we have the venue, Congress, and the question they can adjudicate, when are the unborn legal persons, we can answer that question, which includes penalties. Note that legal people who are killed by contract deserve that the killer and the person who ordered the murder both be brought to justice. Under equal protection, whether that person is a fetus or a 50-year old man, the penalties must be the same. If not, the discussion is over

There will be unique circumstances for the unborn. If the child is doomed due to genetic faults such that it would be stillborn, there should be no legal consequence for inducing labor for the health of the mother (the Church disagrees, but we are discussion civil, not canon law and the argument that one must follow the other is relativistic Catholicism). In general, a child 25 weeks into gestation can survive with assistance (although that cannot be mandatory either), so the child should be protected. Earlier it can't survive or will be sick.