Placenta
Afterbirth
noun, の adjective
Something comes out of a womb and is then put on a tray. It's the afterbirth. Yeah, yeah, eww. Grow up, it's a word you should know.
たいばん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
出産後、妻の胎盤を食べてみました。
I ate my wife’s placenta after she gave birth.