So, i found this video on youtube where a so called doctor informs women about the connection between menstrual cups and endometriosis. I almost bursted out laughing because tampons cause Toxic Shock Syndrome for a fact and they are still being sold worldwide. This is a deadly diasease while endometriosis isn't. But suggesting that a woman's period can travel backwards because of the cup is just silly. Looks like the big industry is feeling threatned...
I can't post the video, dunno why, so here's the link: http://www.youtube.com/watch?v=xuATeOXsjv8