Specifically, it’s about menstrual stigma
Period Stigma Serves Men But Is Perpetuated By Women — Why?
Abby Norman

If you have more than one stigma, you bloody well have stigmata. It’s a sign! No, really: from the Latin stigma, mark, brand (the kind made by hot iron); from the Greek stizein, to tattoo.

“A high percentage (perhaps over 80%) of all stigmatics are women.” (Carroll, Michael P. (1989). Catholic Cults and Devotions: A Psychological Inquiry. McGill-Queen’s University Press. pp. 80–84.)

Sorry, couldn’t help myself …