I've heard of this, I think it was on one of those national geographic shows about secluded tribes. Pretty sure those particular tribes had descended from cannibals, so the eating of placenta was a much lesser yukky than their yukky of yore...
Still really freaking yukky.
Placenta Cemetery, sounds like the title to a Stephen King knockoff, IT"S ALIVE hahaha!
Imaging a horde of them, coming for us all like the army of the dead in game of thrones!!
AAAARRGH!!!