In a genetic test, a small sample of blood, saliva, or tissue is taken to examine a person's genes. Sometimes, genetic testing can detect diseases that may be preventable or treatable. This type of testing is available for thousands of conditions. If you’re considering genetic testing, it’s important to understand the benefits as well as the drawbacks.
The information on Creating a Family Health History was developed for NIHSeniorHealth by the National Human Genome Institute (NHGRI) at NIH.
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