Menstrual cycles intermittently synced with Moon cycles says study 

zaidpub (old blog)
zaidpub (old blog)

I knew and taught this > 40 years ago … nothing intermittent about it when you remove artificial light, urban urbanity, and then take women into a country village. Within 2-3 months they all begin cycling together. This is known fact long ignored by dumbed-down medical folks. Ecah generation is getting stupider … covid is living proof of that!  ~ oz
Menstrual cycles intermittently synced with Moon cycles says study — Science & Technology — Sott.net