Chainsaws were actually invented to help women give birth to babies.
In the old days when a baby got stuck due to breech or being too large, surgeons used chainsaws to remove bone and cartilage from the pelvis in a procedure called a ‘symphysiotomy’.
It was powered by a hand crank and had teeth on a chain that moved round the edge of the device.
It evolved into what we have today and is no longer used on women.
Where this gets crazy:
They originally used a small knife, which took a long time, and was very painful so they moved on to more humane methods like the chainsaw.