In moral teaching that I'm familiar with certain universal truths apply regarding the elements of any act 1) The moral object, the act, itself, that one plans to do. Is the act, by it's nature, morally right or wrong from the outset? In this case the question is, does abortion constitute the taking of innocent human life? 2) Intent or the end in view. What does the person intend to accomplish by the act? 3) Circumstances, which can change/mitigate the goodness or evil of, and therefore the culpability for, an act. Is the person under duress? Are others involved? What other considerations may exist? etc
Doing anything that causes harm to ourselves or others is morally wrong, whether we know about the harmful consequences or not. If we do know about them, and our intent is to continue anyway without regard to the results, then we become participants, we're culpable for the act.
Some cases of homicide are considered to be justifiable, some cases less so, some not at all depending on intent and circumstances. And the case of an induced "miscarriage", whether faked or not, would not change the moral goodness or evil of the act; it's either right or wrong to begin with. We don't do away with laws against murder simply because some murders are staged, to appear to be accidents.