'As the Norwegian historian Camilla Mørk Røstvik notes in Cash Flow, the “menstrual economy” is booming, expected to reach $27.7 billion by 2025.

Cash Flow describes the rise of this industry through a series of case studies from 1945 to the present, showing how the development and marketing of various menstrual products has at times catalyzed, at other times mirrored, seismic economic and cultural shifts around the world.'

https://www.nybooks.com/articles/2024/02/08/month-to-month-period-the-real-story-of-menstruation/