[QUOTE=cj finn]
You guys could just go with the old “if the fetus is viable, it has rights” school of thought.
[/QUOTE]
There’s a slight difference. If a fetus does not have a brainstem that connects to the spinal cord, I’ve got a very hard time saying that it’s got rights, even if medical technology advances (via, e.g., artificial wombs) to the point where it’s viable. On the other hand, a fetus who’s got a brainstem connected to the spinal cord–happens around the 24-26 week, IIRC–has got a much better claim at rights, even in situations or at times when there was no technology available to keep it alive outside the mother’s body.
Rights for me are all about existent personalities and capacities. If you lack both a developed personality (as a person in a coma has) and the capacity to think, feel, perceive, etc., then I’m unlikely to give you rights. If you’ve got at least one of those things, I’m much likelier to give you rights.
The viability issue only figures in if the fetus already has rights–it doesn’t convey rights itself.
Daniel