Seachangeshell - I'm pro-choice. I think the law in England as it stands seems right to me. Up to 24 weeks. Or longer if the mother's life is in danger or the baby would have a very severe disability and very poor quality of life.
I would be opposed to a change in the law allowing abortion up to the time of birth in other cases.
Having said that there would still be individual cases that would be difficult, e.g. if the pregnant woman didn't realise she was pregnant in time.
A lot of people (including me) would say you are not pro choice with these views. One of the arguments for extending the time limit to full term is because it eliminates discrimination against foetuses that would be born with disabilities.
Another good argument is that pretty much every case of late abortion is a difficult individual case. Women who didn't realise they were pregnant until too late, women in deep denial following a rape, very young girls concealing pregnancies, long delays in the process of actually getting an abortion. There was a paper somewhere of all the (tiny number of) women seeking a post-20 week abortion for non-medical reasons in a year. They were all heartbreaking. I'll see if I can find it again.
Women are not simply sitting around, idly twiddling their thumbs and waiting until the last minute. Neither are they suddenly deciding to have late abortions for frivolous reasons.
As early as possible, as late as necessary.
This reminds me, do people know about Lord Shinkwin's Abortion (Disability Equality) Bill that's being debated at the moment? The idea is to lower the time limit of abortion for medical reasons to 24 weeks, in line with the general limit. There's a good article here