Actually, morning after pills do prevent implantation if fertilization has already occurred. In the drug information I read, this was mentioned as a secondary method of action that increased their effectiveness. As opposed to regular birth control pills where prevention of implantation is not consistent enough to be be relied upon as a backup.
Fair enough.
They key with them being “morning after” is there is a reasonable, statistical assumption that if used properly, they are contraceptive and not abortive.
My wife works at a catholic health system. She has to know this stuff up and down as she often is involved in the ethics discussions dealing with Romneycare here in MA. If it’s good enough for the “Sisters” in charge....