the whole premise of looking at abortions as a supply issue and not a demand issue is why we dont get anywhere
its not a matter of why its legal at what point. the more poignant question is why do people need abortions at those stages.
people have to get early term abortions often because they failed to use contraception, used it incorrectly, or in a fringe minority of cases, they used it properly and it simply failed. its more important to figure out why we have such a high demand for abortions and how we can address that, rather than asking how we can legally limit people's ability to get them. do we have adequate sex ed? is contraception encouraged enough? should health insurance automatically provide for contraception?
and then same for later term abortions. why does anybody ever need abortions in those later months? is it because they didnt have basic levels of prenatal care? didnt detect the pregnancy until later because they have for sex ed? didnt get basic genetic screening done because of the cost, and only detected an issue later? then we should address those to make it so people dont get into that position nearly as often