I agree that expecting doctors to terminate healthy pregnancies after the baby could survive on its own is wrong. Presumably the point at which life is viable outside the womb is going to keep coming down.
What I am unclear about is how many women are terminating healthy pregnancies after 20 weeks. I would imagine that the figure is very very small, and that the circumstances are not straightforward.
To choose an abortion over other forms of birth control is not a logical decision. Most of us don't even like going for smear tests. An abortion is at best a painful and invasive procedure, may be expensive and involves far more trips to the clinic than just going in to pick up a pack of condoms. This is before any question of emotional trauma. Maybe there are women who don't bother with contraception because they would rather have repeat abortions, but they must be a few bricks short of a house, and probably aren't going to change their actions because the abortion time limit is reduced.
On the other hand, if the legal time limit for abortions was reduced, we seem to generally agree that abortions on medical grounds should still be allowed. However, how would they put into law what was an acceptable medical ground for termination between say 20 and 24 weeks? I am concerned that women who fell outside the criteria would end up having to go to court for a termination. If the criteria was vague, what would be the point in changing the law at all, particularly if I am right that hardly anybody without a medical reason for an abortion has one after 20 weeks.
I suppose what I think is that this is a very complicated issue. However, I think that the cardinal's argument that reducing the time limit will reduce the number of abortions is wrong.