Jennifer Hawke-Petit and her two daughters were raped and murdered, while her husband, Dr. William Petit, was injured during a home invasion in Cheshire, Connecticut.
This signal is called thyroid stimulating hormone (TSH). As the name implies, this hormone stimulates the thyroid to produce thyroid hormone and to grow in size. This abnormal growth in size produces what is termed a âgoiter.â Thus, iodine deficiency is one cause of goiter development. Wherever iodine deficiency is common, goiter will be common.
Four hormones are critical in the regulation of thyroid function: 1  Thyroxine (T4) and Triiodothyronine (T3). Thyroxine (T4) is the key hormone produced in the thyroid gland. 2  Thyrotropin. Thyrotropin (also called thyroid-stimulating hormone or TSH) is another very important hormone in the process.