Are you sitting down? Read page 17 of today's majority opinion in Carhart v. Gonzales:
The Act does apply both previability and postviability because, by common understanding and scientific terminology, a fetus is a living organism while within the womb, whether or not it is viable outside the womb. ... We do not understand this point to be contested by the parties.
Did you catch that? According to the explicit and undisputed wording of Supreme Court, a fetus in the womb is a living organism. The fetus is not a "potential life." It's a life.
The obvious follow-up is to ask what kind of organism the fetus is, and the answer is as straightforward as it is undeniable. The fetus is a human organism. A human being.
That's a huge legal victory. Common sense and science finally enjoy the muscle of the Supreme Court to back up what every honest person with half a brain knows: the unborn are human beings.
Now we can really start to undermine the silly pro-abort argument about the unborn being human but not "persons."

Amazing, isn't it? Apparently before this court ruling they thought that maybe a fish or a plant or maybe a car might emerge from the womb.