Pituitary hormone that stimulates the thyroid gland to produce thyroxine (T4), and then triiodothyronine (T3).
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 813 (https://doi.org/10.1515/pac-2015-1202)