Finding out whether you carry the genetic predisposition to coeliac disease.
Almost everyone with coeliac disease carries the HLA-DQ2 or HLA-DQ8 genes. If you do not, coeliac disease is very unlikely, which is useful to know when there is unexplained anaemia or iron deficiency, recurrent miscarriage, difficulty getting pregnant or digestive symptoms.
Carrying them does not mean you have coeliac disease: a large part of the population carries them and most never develop it. If the result is positive and there is a suspicion, the diagnosis is completed with blood antibody tests and, when needed, with a gastroenterologist.