Thalassemia genetic test is a DNA test by PCR through blood sampling, and the diagnostic standard is the laboratory biology test report. At present, thalassemia is simply divided into alpha thalassemia and beta thalassemia, which are both genetically determined. If the fetus is at risk of thalassemia major, the parents need to take the initiative to minimize the risk by prenatal diagnosis; genetic diagnosis to identify whether the fetus has thalassemia major genotype, and if so, the pregnancy should be terminated.