We are now learning that genes have a significant role in determining who gets endo, and how severe it is.
Somewhere between 10-20% of women with endo have bowel
involvement. Rectal and sigmoid locations are the most frequent sites for bowel endo, and it causes pain with bms all month long. You usually can't see endo on colonoscopy
so many women arent diagnosed by GI docs to whom they're referred.