Menstruation is a universal phenomenon. Why is it taboo to talk publicly about it?

Dusty Rhodes/NPR Illinois
Talking publicly about menstruation has been taboo for a lot of human histor, despite how common an experience it is. We spoke with two researchers who study the impact of period stigma on girls and women across the globe and consider how the issue plays out in the U.S.
Guests:
Marni Sommer
Professor of sociomedical sciences, Columbia University Mailman School of Public Health, expert in global health and development
Urooba Fatima
Graduate student, biological anthropology, University of Illinois Urbana-Champaign, studying menstrual taboo in Pakistan