This is just an interesting passage I picked up from a book on pregnancy epidemiology (click on it to make it bigger):
"Maternal Mortality and Severe Maternal Morbidity", K.S. Joseph in Reproductive and Perinatal Epidemiology edited by Germaine M. Buck Louis, Robert W. Platt. Oxford University Press, 2011, p.212
What the authors say is that women who are pregnant or who have been recently pregnant are less likely to die than women who have not been pregnant.
So much for the "pregnancy is dangerous" meme I see from the poor-choicers in abortion debates.