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  2. Levothyroxine - Wikipedia

    en.wikipedia.org/wiki/Levothyroxine

    Levothyroxine is a synthetic form of thyroxine (T 4), which is secreted by the thyroid gland. Levothyroxine and thyroxine are chemically identical: natural thyroxine is also in the "levo" chiral form, the difference is only in terminological preference. T 4 is biosynthesized from tyrosine. Approximately 5% of the US population suffers from over ...

  3. Thyroid hormones - Wikipedia

    en.wikipedia.org/wiki/Thyroid_hormones

    When pregnant, a woman with a low-functioning thyroid will also need to increase her dosage of thyroid hormone. [16] One exception is that thyroid hormones may aggravate heart conditions, especially in older patients; therefore, doctors may start these patients on a lower dose and work up to a larger one to avoid risk of heart attack. [17]

  4. Sum activity of peripheral deiodinases - Wikipedia

    en.wikipedia.org/wiki/Sum_activity_of_peripheral...

    The sum activity of peripheral deiodinases (G D, also referred to as deiodination capacity, total deiodinase activity or, if calculated from levels of thyroid hormones, as SPINA-GD [a]) is the maximum amount of triiodothyronine produced per time-unit under conditions of substrate saturation. [1]

  5. Most women older than 65 don't need to stop hormone therapy ...

    www.aol.com/lifestyle/most-women-older-65-dont...

    Now, new research finds that women who use hormone therapy after age 65 are usually fine to do just that — but the dose and timing of the treatment matter. The study, which was published in ...

  6. Thyroxine - Wikipedia

    en.wikipedia.org/wiki/Thyroxine

    Thyroxine, also known as T 4, is a hormone produced by the thyroid gland.It is the primary form of thyroid hormone found in the blood and acts as a prohormone of the more active thyroid hormone, triiodothyronine (T 3). [1]

  7. Thyroid disease in pregnancy - Wikipedia

    en.wikipedia.org/wiki/Thyroid_disease_in_pregnancy

    Hypothyroidism is common in pregnancy with an estimated prevalence of 2-3% and 0.3-0.5% for subclinical and overt hypothyroidism respectively. [8] Endemic iodine deficiency accounts for most hypothyroidism in pregnant women worldwide while chronic autoimmune thyroiditis is the most common cause of hypothyroidism in iodine sufficient parts of the world.