sex during period=endometriosis

I've read somewhere about the possible consequences of sex during period. You can get endometriosis. Very concerned now. Was this fact scientifically proven?
Thank you!

[ladyheart]

well i had endometriosis before i ever lost my virginity, so if it's a fact, i never heard of it

[AnnJ]

I never have sex during my period, and I have endo.

[HD84]

http://en.wikipedia.org/wiki/Endometriosis

[monkeyflower]

Intercourse during your period is fine and won't cause any physical problems at all. In fact, orgasms during your period can lessen cramps :-) What you heard is an old wives' tale (and one I hadn't heard before :-)).