I'm all for the sacrifice of who ever has the least chance of survival if no intervention equals the death of both.
I'm pro-choice, I am in favour of a woman getting an abortion if she doesn't want a child (though it would be much simpler to just avoid getting pregnant in the first place).
However there have been some suggestions that this woman may have died even if she had an abortion so using her as an argument for "abortions save lives" is just wrong.