There are four stages when it comes to the severity of endometriosis, which stage you may be classified as will depend on the location, amount, depth, and size of the endometrial tissue that your doctor finds and can diagnose you from there. Stage 1: Minimal Stage 2: Mild Stage 3: Moderate Stage 4: Severe The specific criteria in which your doctor will be able to classify you for a diagnosis and then provide a specific treatment will go off of: - Extent and spread of the endometrial tissue - Involvement of pelvic structures within the disease - The extent of pelvic adhesions - If there is any blockage of the fallopian tubes As stated above, the stage at which you may be diagnosed for endometriosis does not reflect the level of pain you may experience with endometriosis, risk of infertility, or other symptoms. As it is possible that a woman with stage 1 may experience severe pain, while a woman with stage 4 may experience nothing. Call us for more information. We serve patients from Chicago IL, Evanston IL, Ravenswood IL, Uptown IL, Lake View IL, Lincoln Park IL, Buena Park IL, Bowmanville IL, Boystown IL, and Roscoe Village, IL.