本研究结果表明,适龄早产儿脐血清T_2、T_4 含量比对照组低,小于胎龄儿脐血清T_3、T_4含量比适于胎龄儿低,而适龄早产儿和小于胎龄儿脐血清TSH含量与对照组无显著差异;适龄早产儿和小于股龄儿脐血清T_3、T_4含量均分别与其1分种Apgar评分呈正相关;对脐血清T_4减低的婴儿生后6周随访,血T_3、T_4含量均已正常。说明早产儿和小于股龄儿易发生暂时性低甲状腺素血症。而母乳中含有一定量的T_3,母乳喂养能补充暂时性低甲状腺素血症婴儿高活性的T_3。 The results of this study showed that the content of T 2 and T 4 in umbilical serum of premature infants of the right age group was lower than that of the control group. The content of T 3 and T 4 in umbilical serum of less than gestational age children was lower than that of the premature infants, There was no significant difference between the preterm infants of premature infants and those of younger infants whose serum levels of T_3 and T_4 were correlated with Apgar score of 1 minute respectively. All normal. Description of premature children and less than the age of children prone to transient hypothyroxinemia. The breast milk contains a certain amount of T_3, breastfeeding can supplement the temporary hypothyrohaline baby hyperactive T_3.