From Ask Dr Wiki
Synonyms: TSH, TSH 1, Thyreotropin, thyroid stimulating hormone
Thyrotropin is a glycopeptide hormone that is secreted by the anterior pituitary lobe. It stimulates formation of thyroid hormones in the thyroid gland. Conversely, in the context of a feedback control TSH secretion in the pituitary is inhibited by thyroid hormones (thyrotropic feedback control).
The following factors influence secretion of TSH: