地方性呆小病是由于孕妇得了甲状腺肿,体内缺碘,而怀孕期间,碘的需要量更大,胎儿在母体得不到足够的碘,甲状腺往往发育不全。甲状腺的主要作用是产生甲状腺素,甲状腺素与人的生长、发育和生理机能关系很密切。碘是生成甲状腺素不可缺少的 Endemic small ailments is due to pregnant women had goiter, the body of iodine deficiency, and during pregnancy, the greater the need for iodine, fetus in the mother can not get enough iodine, thyroid often hypoplasia. The main role of the thyroid is to produce thyroxine, thyroxine and human growth, development and physiological functions are closely related. Iodine is indispensable to the production of thyroxine