RT Book, Section A1 Polak, Michel A1 Refetoff, Samuel A1 Szinnai, Gabor A1 Vliet, Guy Van A2 Sarafoglou, Kyriakie A2 Hoffmann, Georg F. A2 Roth, Karl S. SR Print(0) ID 1140319020 T1 Disorders of the Thyroid Gland T2 Pediatric Endocrinology and Inborn Errors of Metabolism, 2e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071773140 LK accesspediatrics.mhmedical.com/content.aspx?aid=1140319020 RD 2024/04/19 AB The thyroid gland is the first of the body’s endocrine glands to develop (~24th day of gestation), and its maturation can be divided into two phases. The first phase involves embryogenesis of the thyroid gland and of the hypothalamic-pituitary-thyroidal (HPT) axis. The second phase involves further development of the HPT axis, including hormone production and regulation.