在新生儿普查中发现大约3000～4000名新生儿中有1名患先天性甲状腺功能低下。在新生儿阶段,受累的新生儿通常没有症状或体征。患先天性甲低的新生儿如果在生后早期给予迅速的治疗和早期密切观察,其发育在6～7岁时可能达到正常。因甲状腺的发育和其它器官的发育同时发生,且甲状腺激素影响细胞代谢,所以患先天性甲低的新生 One in about 3,000 to 4,000 newborns was found to have congenital hypothyroidism in the neonatal census. In the neonatal period, the affected newborn usually has no symptoms or signs. Newborns with congenital hypothyroidism can develop normally at 6-7 years of age if they are treated early and quickly with early and close observation. Due to the development of thyroid and other organ development occur simultaneously, and thyroid hormone affect cell metabolism, so suffering from congenital hypothyroidism