If I was a Catholic, and I thought I was a member of his church, I would consider what his opinion would be to be far more than "conjecture".
I am pro choice with reasonable limits. I respect people like Bill Maher who acknowledge that abortion is homicide but they are for it anyways because the good outweighs the bad. But I can't accept the hypocrisy of draping yourself in Christianity and supporting it.
It's obvious, Jesus would be pro life. No ifs, ands or buts.