Endometriosis severity is measured in stages.

Stage 1 is referred to as minimal endometriosis and may or may not have an effect on fertility. Stage 1 endometriosis is usually treated with medications unless you are trying to conceive. If you are having trouble conceiving, then even minimal amounts of endometrial implants and lesions may need to be surgically removed. Another reason to treat stage 1 endometriosis is because it is progressive and can lead to dangerous organ damage down the line.

Stage 2 endometriosis is mild, but more than just the occasional lesion or implant is visible. Stage 2 endometriosis usually means that at least one of the ovaries has endometriosis present. This can lead to your fallopian tubes being blocked by scar tissues or the ovaries themselves being compromised by the present implants.

Stage 3 endometriosis is considered moderate. Stage 3 is used to describe endometriosis, usually on both ovaries as well as the uterus. Implants and lesions may be deeper and take up more area than stage 2 implants and lesions. Surgical treatment of stage 3 and stage 4 endometriosis historically has had the greatest impact on fertility associated with endometriosis.

Stage 4 is the most severe. Stage 4 is used to describe endometriosis that is prominent in the abdominal cavity. Stage 4 endometriosis can affect many surrounding organs and be very dangerous. This is the stage most commonly associated with infertility.

If you are experiencing any endometriosis symptoms and are having trouble conceiving, then you could have an advanced level of endometriosis. You should never ignore endometriosis symptoms or prolong treatment.