Many states in the United States mandate a thyroid blood test to be performed on all newborns.

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This is true. All 50 states in the United States require a thyroid blood test to be performed on newborns as part of their newborn screening program. The test checks for congenital hypothyroidism, a condition where the thyroid gland does not produce enough hormones. Early diagnosis and treatment can prevent developmental delays and other complications.

Many States in the United States Mandate a Thyroid Blood