Both contraception and abortion are against ALL Catholic principles. God is clearly opposed to killing innocent children. Even the victims of rape.
Not everyone is a practicing Catholic... and with the 2.5 children households I'd say it's a good bet Catholics aren't practicing Catholics.
I have asked myself what I would have done if any of my daughters, at 12 or 13 or 14, for example, had been raped and became pregnant as a result. Fortunately, that never happened. Yet I cannot say I could have insisted they must carry this child to term and give birth. Dear Lord, how can we put this on someone who is, in fact, a child, one who did not choose to be assaulted in this way?
I do not condone abortion, though you may conclude I do. Yet for any parents who have experienced such a violation of their child, I will be not be among those who condemn them for protecting that child.
In an ideal world, no one would ever confront this, or all the other evils which surround us.
C'mon, how many Catholic families do you know with more than three kids?