Some useful links I found please let me know if you have any other links you would like to share
http://www.endometriosis-uk.org/
http://www.nhs.uk/conditions/Endometriosis/Pages/Introduction.aspx
http://en.wikipedia.org/wiki/Endometriosis
http://www.patient.co.uk/health/endometriosis-leaflet
http://womenshealth.gov/publications/our-publications/fact-sheet/endometriosis.html
http://www.clearpassage.com/blog/