Saggarmakers... (blimey, that is a loooong nick) and madamez, purely from the point of view of logic, if we do not consider that a foetus is a human being until birth, and therefore only the rights of the woman are to be considered, what is the point in passing a law to set a time limit for abortion? 24 weeks? why not 23? or 32?.
You will agree that the fact that there is a law regulating abortion, and the fact that most people think it is -at the very least- not desirable, means that society somehow recognises that at some point between conception and birth the foetus acquires a status that makes him/her subject of human rights. This, to me, is at the heart of the debate. So far, society is unable to come to a joint decision (doctors, scientists, philosophers, people in general) on when exactly life begins, so other criteria like foetus viability had to be introduced. Now, as someone pointed out, viability out of the woman's womb is becoming possible earlier and earlier. This criteria is not good enough.
It seems to me that in the absence of real knowledge of where life begins, we should err on the side of caution.
Madamez: some severely disabled people have no control on their bodies and depend fully on other people to survive. Those people have human rights, just as anyone else, not less, not more, not of any different kind. You either have the right to live or not. I disagree with you because I think what makes you subject of human rights is your "human" condition not your ability to survive out of the womb. And I still struggle to accept that a woman should have the right to abort a life just because nature is organised in such a way that, as far as mammals are concerned, new lives need to be nurtured inside the bodies of female individuals.