Endometriosis is characterised by presence of benign ectopic endometrial cells outside of uterine cavity affecting up to 10% of reproductive age group. Leading to severe inflammation, pelvic pain and infertility. Endometriosis is associated with presence of variety of autoantibodies and fulfils most of classification criteria for autoimmune disease such as tissue damage, polyclonal B lymphocytes activation, B lymphocytes immunological abnormalities, female preponderance, multi-organ involvement, possible genetic and environmental factors, beside association with other autoimmune diseases. Thyroid autoimmunity and dysfunction is the most common autoimmune disease in women of reproductive age and affects 5–20% of the female population. There may be a potential link between autoimmune disease and Endometriosis, but the available data has been contradictory making it difficult to establish a cause-effect relationship. While studies have been done looking for association in between these two diseases there is a gap of such study in the South Asian population. And there is a need for severity association in patients of Endometriosis with Thyroid Disorder, to look for any association of Thyroid disorder leading to increased severity and if controlled is there any improvement in patient quality of life.