This type of testing is used to test unaffected members of a family with a history of a genetic disorder such as cystic fibrosis.

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Carrier testing is used to identify unaffected individuals who are carriers of a genetic disorder and can pass on the disorder to their children. In the case of a family with a history of cystic fibrosis, carrier testing can be used to identify family members who are carriers of the CF gene but do not have the disease. This information can be useful for family planning and genetic counseling. Presymptomatic testing is used to detect the presence of a genetic mutation in individuals who have a family history of a late-onset genetic disorder, but who have not yet developed symptoms. Prenatal diagnosis and amniocentesis are used to test a developing fetus for genetic disorders. Ultrasonography is an imaging technique that uses high-frequency sound waves to create images of the inside of the body. It is not used for genetic testing.

This Type of Testing Is Used to Test Unaffected Members