Then say the states rights approach, genius.  Because the civil war didn't end "the states rights approach."  Roe v. Wade did . . .  sorta.  Even Roe recognized the right of the states to intervene at a certain point.  By the way, whether Constitution's allocation of power between the states or the federal government "works" is not a matter for Constitutional adjudication.  That was one of the points made by a well known scholar, John Hart Ely (a liberal and proponent of abortion rights).

So my question remains:  What did the civil war amendments say about abortion?