Prevention of birth is premature murder, and it makes no difference whether it is a life already born that one snatches away or a life that is coming to birth.
Every soul, then, by reason of its birth, has its nature in Adam until it is born again in Christ; moreover, it is unclean all the while that it remains without this regeneration; and because unclean, it is actively sinful, and suffuses even the flesh (by reason of their conjunction) with its own shame.
Prevention of birth is a precipitation of murder.
To forbid birth is only quicker murder.