I was brought up RC, but I say this as a human being, not a RC.
I could NEVER contemplate aborting another human life, regardless of the length of the pregnancy as far as i'm concerned it's a baby from day one.
That said, EVERYONE has a right to their own views and this woman has taken the decision to continue with her pregnancy to give the children a chance. I don't think she is solely doing it on religious grounds.
The twins in the states, as someone else has already pointed out, lead normal lives. They go to college, movies, shopping, drive a car etc etc just like kids with one head do.
It is a sad fact that society might cause problems for them in the future if they were to survive for a good number of years, but, thats societys problem People can be so ignorant. There but for the grace of god..... springs to mind.
I wish her and her babies all the best