There should be a site (hopefully from someone other than Pio Nono - sadly, he was the first to say life began at conception - figures).  Original Sin is the Confessions of St. Augustine.  The Resurection, the entire new Testament, particularly Corinthians 15.  The Assumption, for the west, Vatican I, but it was traditional.  For abortion, the never part was Evangelicum Vitae, which was more forceful, although in mostly parroting the Aristotelian test of when life should be respected, leaves openings.

Of course the book of Numbers mandated abortion if adultery was suspected by someone who had not been with a wife and she looked pregnant.  If  fetal matter came out, she was to be stoned.  That could have happened to Mary, but Joseph did not bring her before the law.  That is what the passage means. Relying only on the Decalogue is a stretch on abortion and it has nothing to do with the anti-states-rights ruling in Roe.