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  2. Hypothalamic–pituitary–thyroid axis - Wikipedia

    en.wikipedia.org/wiki/Hypothalamic–pituitary...

    The TSH, in turn, stimulates the thyroid to produce thyroid hormone until levels in the blood return to normal. Thyroid hormone exerts negative feedback control over the hypothalamus as well as anterior pituitary, thus controlling the release of both TRH from hypothalamus and TSH from anterior pituitary gland.

  3. TRH stimulation test - Wikipedia

    en.wikipedia.org/wiki/TRH_stimulation_test

    If the increase in serum TSH level following TRH administration is absent or very slight, then the cause of the hypothyroidism is in the anterior pituitary gland, i.e. the pituitary is not secreting TSH. Therefore, even when TRH is given exogenously, TSH levels do not rise as the pituitary is diseased. [citation needed]

  4. Thyroid function tests - Wikipedia

    en.wikipedia.org/wiki/Thyroid_function_tests

    However, when TSH is measured by itself, it can yield misleading results, so additional thyroid function tests must be compared with the result of this test for accurate diagnosis. [4] [5] [6] TSH is produced in the pituitary gland. The production of TSH is controlled by thyrotropin-releasing hormone (TRH), which is produced in the hypothalamus ...

  5. Thyrotropin-releasing hormone - Wikipedia

    en.wikipedia.org/wiki/Thyrotropin-releasing_hormone

    The hypothalamic-pituitary-thyroid axis. TRH can be seen in green. TRH is synthesized within parvocellular neurons of the paraventricular nucleus of the hypothalamus. [2] It is translated as a 242-amino acid precursor polypeptide that contains 6 copies of the sequence -Gln-His-Pro-Gly-, with both ends of the sequence flanked by Lys-Arg or Arg-Arg sequences.

  6. Thyroid-stimulating hormone - Wikipedia

    en.wikipedia.org/wiki/Thyroid-stimulating_hormone

    The therapeutic target range TSH level for patients on treatment ranges between 0.3 and 3.0 μIU/mL. [18] For hypothyroid patients on thyroxine, measurement of TSH alone is generally considered sufficient. An increase in TSH above the normal range indicates under-replacement or poor compliance with therapy.

  7. Common thyroid drug levothyroxine linked to bone mass loss - AOL

    www.aol.com/common-thyroid-drug-levothyroxine...

    Thyroid stimulating hormone (TSH) is produced by the pituitary gland, another hormone-producing organ in the head. This in turn causes the thyroid to produce T3 and T4, which play a role in the ...

  8. Template : Target ranges for hormone levels in hormone ...

    en.wikipedia.org/wiki/Template:Target_ranges_for...

    "Providers are encouraged to consult with their local lab(s) to obtain hormone level reference ranges for both 'male' and 'female' norms, [which can vary,] and then apply the correct range when interpreting results based on the current hormonal sex, rather than the sex of registration." [3] Fenway Health: United States: 100–200 pg/mL <55 ng ...

  9. Here's Why Testosterone Is a Female Hormone, Too - AOL

    www.aol.com/heres-why-testosterone-female...

    Women in their mid-40s and 50s have half the testosterone that we had in our 20s.” The balance between the two hormones shifts, too. “Before menopause, the main hormone is estrogen, and ...

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