If you had a recent blood transfusion, you may not be able to have the test, or the test results may not be helpful. If you have a blood transfusion from a blood donor who has normal levels of hexosaminidase A, your level may temporarily be higher than usual.
What To Think About
A positive Tay-Sachs test may need to be confirmed with other genetic tests. To learn more, see the topic Genetic Test.
People who have a high chance of being a carrier of Tay-Sachs may want to have a blood test before they have children, to see whether they are carriers. People of Ashkenazi Jewish, French-Canadian, or Cajun descent, or those who have a family history of Tay-Sachs disease or who live in a community or population with a high amount of Tay-Sachs disease may want to be tested. Genetic counseling is available for people who have the disease or are carriers.