"--Honestly, I have no idea. I'm glad I never had to make that choice. In nature, they probably would have both died. The doctors involved also might have a role in deciding, I don't know what I'd do."
Now lets apply the same mode to the abortion issue.
In nature, away from politics and societal demands, a women would be free to do with her body what she wanted. Gotcha ;-)
So if nature is the set point of free will the all this is moot.