When the health of the mother is in danger.
People have a right to protect their own life - even if it means using deadly force.
That's the only time imho.
My question on that, what parent would sacrifice the child to save themselves.
I would. If a pregnancy was going to kill me I would preserve my life.
My cousin and his wife did just that. They went on to have 2 more children.
If my cousin's wife was denied the life saving abortion she needed, those 2 other children never would have been born.
If you want to die because your pregnancy went wrong that's your choice. No one is stopping you.
However you want to stop women from not dying because her pregnancy went wrong.
For your information forcing a woman to die that way isn't pro life.