In the United States, most newborns undergo a test for primary congenital hypothyroidism, a condition where people are unable to produce enough thyroid hormone. On a nationwide basis, this is an example of

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The test for primary congenital hypothyroidism is an example of genetic screening, as it involves testing newborns for a genetic condition that may not be immediately evident. Genetic testing typically refers to tests performed on an individual to diagnose or risk assess a specific genetic condition, whereas genetic screening is a broader term that refers to testing a population or group of individuals for a particular genetic condition. Amniocentesis and preimplantation genetic diagnosis are types of prenatal genetic testing, which occurs before a baby is born.

In the United States, Most Newborns Undergo a Test for Primary