endometriosis and menstrual cups

[groupieforhire.livejournal.com]

Today was my first day using my Diva Cup, and it's worked out wonderfully well. I'm intrigued as to how nothing spills out when I'm horizontal (read: asleep), and definitely happy with how things are going. Thinking about it for a while, the whole idea seemed weird again, so I did a google for a tiny bit more research. (Yeah, I know, you're supposed to research before you put things in your body... oops.) I found this link about the increased risk of endometriosis with menstrual cups due to menstrual fluid spilling back into the pelvic cavity. There's also a letter written to the FDA about it. Diva Cup says probably not. Anyone have any thoughts on this? Opinions? Debunking? Just thought I'd bring it up for discussion and see if anyone knew anything about it :)

x-posted to menstrual_cups

edit: Okay, so apparently this has been brought up a lot and is a bit unfounded. It hasn't been discussed in a while, though... anything new?