Test Details: Alpha thalassemia is an autosomal recessive inherited disorder caused by mutations in the HBA1 and HBA2 gene responsible for haemoglobin production leading to reduced or absent production of alpha globin chains. This test is used to detect the genetic base of alpha globin disorders. Pre-natal Diagnostic Testing helps to detect a risk for having a fetus affected with clinically significant thalassemia in couples where both partners carry an inherited alpha globin chain disorder.