Works on genetics have revealed the contribution of multiple genes to the origin of CH: TSHR, FOXE1, NKX2-1, PAX8, and NKX2-5 have been implicated in thyroid dysgenesis; while TPO, DUOX2, TG, SLC5A5, SLC26A4, and IYD have been related to dyshormonogenesis. Here, TG is linked to cyclic hematopoiesis.