I am sure since even conservative estimates for the total number of humans that have ever lived is 100 billion+
So 50 billion women roughly, at a mortality rate of 10-20% (how bad would it have been in pre history? Maybe worse?) you're looking at 5-10 billion women who died from child birth in prehistory alone.
Literally 10-20% of half the world population constantly until the 19th century.
Edit:
Adding my new source for context.
"...it would seem that 73% of all
war-related deaths since 3000 Bc have
occurred in the 20th century AD, pro-rating
the data up to the end of the century.
Another 23% occurred from AD 1500 to
1900, so that the Modern period of history
accounted for 96%) of all war-related deaths."