At a rough average mortality of 1-2% chance of death per birth, and most women having 6-10+ kids in pre-industrial times, that's a roughly 6-18% chance of death. Most wars are like 3% for fatalities
"...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."
Total war death since 3000 BCE are around 200 million
From 1500-1800 the chance of death from childbirth was 5.6%, and this was with the Renaissance and enlightenment raising living standards somewhat. In antiquity and prehistory the rates would be either roughly the same or higher.
So roughly 1 in 18 odds.