Endometriosis is an inflammatory condition, arguably auto-immune related (which means the body is fighting itself) in nature. Endometriosis can have detrimental effects on the immune, reproductive and endocrine systems, to mention just a few of the heaviest players. Endometrial cells leave their home in the uterus/womb and travel to other parts of the body. Research has shown these cells to have traveled as far as to the nose and brain of cadavers. This exodus of the cells from that region can wreak havoc on women causing symptoms ranging from pelvic and abdominal pain, irregular bleeding, infertility, migraines, etc. Fatigue, painful intercourse, bloating and other gastrointestinal disorders such as diarrhea and/or constipation are commonplace in women who have endometriosis. Here is a great link to the Department of Health & Human Services PDF of a great explanation: http://www.womenshealth.gov/publications/our-publications/fact-sheet/endometriosis.pdf While this link is written by conventionally trained physicians there is hope for endometriosis and infertility with natural, safer methods.