The correct legal action would be to not overturn Roe v Wade, but to have the Supreme Court decide it's a state's rights issue. The Feds have no business deciding moral, social issues. I think the Supreme Court could make this decision and think it's taking the 'middle road' between the "extreme" (as the liberals would call it) complete ban of abortion. From a purely practical standpoint, you can't just outright ban abortion from one day to the next - there would be chaos, rioting and destruction. Better for the Supreme Court to "punt" the issue to the states, where it belongs, and let citizens decide at the state level. If that happened, then you'd have over 50% of the states would ban it immediately. 25% would ban it soon thereafter and the last 25% would be in for a close fight.
Then maybe Congress would see that 'right to life' is the 'will of the people' and they would pass a "life begins at conception" law, which then, the Supreme Court would uphold. Game, set, match.