After doing some quick googling, I was reminded that we read this case in law school:
I suppose under this analysis, the two key questions would be:
1. Does the state in question consider abortion
malum in se (inherently criminal)?
2. Does the state's belief that it is prohibited from enforcing a law constitute a "conspicuous policy of nonenforcement?"
A state wishing to enforce a pre-
Roe ban would obviously argue that, yes, abortion is inherently wrong, and also that the state always desired to enforce the ban, but was only prohibited from doing so by
Roe, and so therefore there was never any conspicuous policy of allowing abortion.