The page below is a sample from the LabCE course Laboratory Assessment of Thyroid Function. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Thyrotropin-Releasing Hormone (TRH)

TRH, also known as thyrotropin-releasing factor, is secreted by the anterior region of the hypothalamus, along with a number of identified and well-characterized releasing hormones. TRH infusion has been used in clinical testing to determine if the pituitary gland is responsive to its stimulation in producing thyroid-stimulating hormone (TSH). While the lack of production of TRH may result in a deficiency of TSH, TRH is not routinely measured in clinical laboratories to assess thyroid function.