But the number of deaths due to childbirth is actually quite small. The CDC estimates that about 700 women a year die in the whole United States from pregnancy related complications. Now that number is a lot higher than it probably should be. But it is still only .01% of the nearly 4,000,000 births in the United States. Given the extremely positive prognosis for pregnancy, it seems morally reasonable to require a woman to bear the difficulties of pregnancy in order to save the life of a separate human child.