that's a legend , winstrol neither doesnt lower progesterone it's not anti-progesterone at all , it binds to the receptors , most people say it doesnt activate it but maybe it depends on people s body , on mine it does activate it and i can see my pectoral getting rounder day by day ; not good.
Same as prolactin/progesteron legends , caber DOES lower PROLACTIN , but it DOESNT lower PROGESTERON , it skyrocket it on the contrary! that's how i got high progesterone , using caber to decrease my prolactin levels which got really high from GHB use ( 1 night of GHB got my nipples on fire and my prolactin levels 10x the normal levels). Caber did decrease it quickly but it increase my progesterone to 5x the normal levels.
I'm gyno prone too , i'm sure most of the people here won't notice any effects on their nipples/gyno with high progesterone.