The movement for free bleeding (free bleeding movement) began in the 70s as a reaction to the toxic syndrome produced by tampons.
In essence, free bleeding is what is proposed is not to use either compress or tampon during the days of menstruation. Some proponents recommend reinforcing the uterine walls through Kegel exercises, yoga or Pilates, others insist on the importance of not leaving menstrual waste inside the vagina and others propose the visibility of menstruation.
This movement gained special visibility when Kiran Ghandi participated in the London marathon when he was with the rule.
I found it interesting to let you know given the amount of gynecological problems related to menstruation that there is nowadays, a way to make see these problems as well.