孕期甲状腺功能异常,尤其是甲状腺功能低下(简称甲低)发病率较高,产后甲状腺功能异常(Postpartum Thyroid Dysfunction,PPTD)在高危妇女中也维持较高的发病水平。母体的甲状腺激素对胎儿有极其重要的影响,孕期甲低对胎儿神经系统发育会造成一定危害,而且孕期甲低和产后甲状腺功能异常也会引起孕产妇多种并发症。近年来,妊娠期和 The incidence of thyroid dysfunction during pregnancy, especially hypothyroidism, is high. Postpartum thyroid dysfunction (PPTD) also maintains a high incidence in high-risk women. The mother of thyroid hormone has a very important impact on the fetus, hypothyroidism during fetal nervous system development will cause some harm, and hypothyroidism during pregnancy and postpartum thyroid dysfunction can also cause a variety of complications of maternal. In recent years, during pregnancy and