DC, I'm falling over backwards because this is, I'm sure, the first time I've ever agreed with you. The idea of O'Connor, given his behaviour, pretending he has any right to stop women choosing what to do with their own bodies is stomach-churning.
Custy, you can compare to yesteryear because whatever the medical advances (and they are frankly often oversold) human nature is stil the same. People will still have sex because it feels good, will have sex on impulse without necessarily being all sensible and middle-aged about it, will get stomach upsets or be prescribed antibiotics by thick docs who 'forget' to mention you need additional contraception, condoms will split, rapists will rape...
And once you do have an unwanted pregnancy, you may get the sort of doctor who will lecture you and try to prevent you accessing the healthcare that is your legal right, the NHS will fail to fund abortions properly because no-one is going to the barricades over those budget cuts, are they, will fail to ensure everyone has abnormality scans when they need them, your friends and family might harass or obstruct you, and so it goes on.
If you believe that women are full human beings who are in charge of their own bodies, then you believe in the right to choose. The argument about time limits is just a trojan horse for the anti-abortionists.
I don't have a link for this, but there is an excellent book called Policing Pregnancy by IIRC Sheena Meredith that demonstrates the danger of giving in to anti-abortionists. Once we let their construct of pregnancy as some kind of battle between evil mother and vulnerable unborn child get prominence, it's a short step away from forced caesareans....