I am pretty sure menstruation and child birth are not farming age inventions.
And patriarchy was never contingent on those things anyhow. It's just a cultural choice that got stuck because it was woven into the form of citified civilization.
> Childbirth works better squatting.
I would like to see citations indicating that these statements are true to a significant degree that modern improvements are of little value.
I can't even find data on maternal mortality before 1800.