•Celiac disease and endometriosis share inflammatory markers and pathophysiology.•HLA-DQ2 and/or HLA-DQ8 were similar between the control and endometriosis groups.•Anti- transglutaminase igA was similar between the control and endometriosis groups.•HLA-DQ2 and DQ8 had no difference in age, symptoms, endometriosis stage or location.