Genetics & Blood Type
Blood type and common genetic variants tested from a blood sample.
14 tests explained
Common follow-up tests
- ABO Blood GroupYour ABO blood group (A, B, AB or O), set by markers on your red blood cells. It stays the same for life and matters for blood transfusions and pregnancy.
- APOE GenotypeA DNA test that shows which versions of the APOE gene you carry (e2, e3 or e4). The e4 version is linked to higher odds of late-onset Alzheimer's disease, but it does not mean you will get it.
- Factor V Leiden (R506Q)A DNA test for a common inherited change in the F5 gene that lets blood clot a little more easily. Most people who carry it never develop a problem clot.
- Fetal Sex (Cell-Free DNA)A pregnancy blood test result that reports whether DNA from the baby, found in the mother's blood, includes a Y chromosome. That points to the baby's sex, but it is not perfect.
- HFE C282YA DNA test for the most common gene change behind hereditary hemochromatosis, a condition where the body absorbs too much iron. Having two copies does not always lead to iron overload.
- HFE H63DA DNA test for a common change in the HFE gene. On its own it rarely causes iron overload, but together with C282Y it can raise iron levels a little.
- HLA-B27A one-time test for HLA-B27, a protein on white blood cells. Many people who have it stay healthy, but it is more common in some kinds of inflammatory arthritis and eye inflammation.
- HLA-DQ2 / DQ8 (Celiac Genetics)A blood test that shows whether you carry the HLA-DQ2 or DQ8 gene versions seen in nearly everyone with celiac disease. It cannot diagnose celiac disease.
- MTHFR A1298CA gene test for a common MTHFR variant that appears milder than C677T. Medical groups advise against routine testing for clots, and most people with it are healthy.
- MTHFR C677TA gene test for a very common MTHFR variant that slightly lowers how your body handles folate. Medical groups advise against routine testing for clots.
- NIPT Aneuploidy Screen (Cell-Free DNA)A prenatal blood test that estimates the chance that a baby has an extra copy of chromosome 21, 18 or 13. It is a screening test, not a diagnosis.
- Prothrombin G20210A (Factor II)A DNA test for a common inherited change in the F2 gene that lets blood clot a little more easily. Most people who carry it never have a problem clot.
- Red Cell Antibody Screen (Indirect Coombs)A blood-bank test that checks whether your plasma has antibodies to red blood cell types you don't have. It is routine in pregnancy and before transfusions.
- Rh (D) TypeShows whether your red blood cells carry the Rh (D) protein: positive if they do, negative if not. It matters for transfusions and pregnancy.