Doctors use genetic testing to:
Testing usually requires a blood sample — or in some cases a sample of hair, skin or other tissue. The samples are sent to a lab for analysis. Later, a genetic counselor will review the test results with the patient. Results are not always 100 percent accurate. For example, in many cases genetic testing can give only an idea of the risk of developing certain conditions. However, genetic testing is invaluable for helping people with a history of certain medical conditions (and other people as well) plan for the future by understanding their health risks.