"Although strictly speaking abortion is a sin because it's taking an innocent life..."

Absolutely not so. If you believe in God you believe in sin. If you think that God is the omnipotent being, then just remember that one in four pregnancies is aborted by Mother Nature. Except that we prefer to use the term "miscarriage." That's another word that is intended to put the burden of guilt on women. "She miscarried..." If you have God, then he's responsible for hundreds of millions more miscarriages/abortions than all the women in history. Next time you hear someone excoriating a woman for having an abortion, just remember that. Especially if the man (yeah...) is invoking the name of the Lord...