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Detection of hypothyroidism
The pituitary gland regulates the function of the thyroid gland (thyroid gland) via thyroid-stimulating hormone (TSH). One of the functions of the thyroid gland is the production of the thyroid hormones T4 and T3. If little T4 and T3 is produced, the pituitary gland secretes TSH, stimulating increased production of thyroid hormones by the thyroid gland. This regulates the hormone balance and keeps it at a constant level.
In the case of hypothyroidism, T4 and T3 cannot be produced sufficiently. The pituitary gland reacts to this by releasing more TSH to activate the thyroid gland. TSH is therefore suitable as a marker for early detection of hypothyroidism.