对３３例正常足月新生儿外周血Ｔ细胞亚群进行了动态监测，发现其外周血淋巴细胞总数逐渐减少，但差异不显著（Ｐ＞０．０５）。Ｔ辅助和诱导细胞亦逐渐降低，至新生儿晚期则显著下降（Ｐ＜０．０５）。而Ｔ抑制和细胞毒细胞则先下降而后回升，但各期间无显著性差异（Ｐ＞０．０５）。本文测定结果可作为评价新生儿免疫状态的参考指标。 T lymphocyte subsets in peripheral blood of 33 normal term neonates were dynamically monitored, and the total number of peripheral blood lymphocytes decreased gradually, but the difference was not significant (P> 0.05). T-helper and induced cells also gradually decreased to the late neonatal significantly decreased (P <0.05). T-suppressor and cytotoxic cells decreased first and then rose, but there was no significant difference between the two groups (P> 0.05). The results of this study can be used as a reference to evaluate the immune status of newborns.