At fetal viability (without extreme medical intervention), barring a severe medical reason.
Can we agree there might be some nuance with the words “viability” “extreme” and “severe”?
It’s an economic choice. The anti-abortion people made it cultural. Why do you think the cultural aspect is more important?
Because we (not you and I but society at large) are not speaking the same language unless most of us agree to your definition above (or at least some definition). To say slavery is an “economic choice” would be beyond insulting in Western society today (though it was framed that way for thousands of years) because we (society) share the same cultural views of slavery. Today, there are hundreds of competing views on abortion that must be worked out culturally before the discussion can move to economics.
Otherwise, pro-lifers will call abortions murder, pro-choicers will call restrictions religious dogma and/or anti-woman, and those of us who think “hey, this stuff is really complicated” will get called wrong from both sides.