本文通过不同胎龄胎儿１４２例进行直接测量体重、身长、顶臀长、头围、胸围的值来研究高原乏氧对不同胎龄胎儿发育的影响。结果：①１３～１６孕周胎儿开始体重低于海平面、两组比较有明显差异（Ｐ＜０．０１），到出生较海平面体重低３６９～４４０克；②胎儿于１３～１６孕周体重衡至指数（ＰＩ）明显高于海平面；③顶臀长于９～１２孕周开始低于海平面，两组对比有明显差异（Ｐ＜０．０１）；④身长于１７～２０孕周开始低于海平面、两组对比有显著性差异（Ｐ＜０．０１）。 In this paper, 142 fetuses of different gestational age were directly measured body weight, length, top hip length, head circumference, chest circumference values ​​to study the impact of plateau hypoxia on different gestational age fetal development. Results: (1) The body weight of fetus at 13-16 gestational weeks was lower than sea level, with significant difference between the two groups (P <0.01), and the birth weight was 369-440 grams lower than that at sea level. (PI) was significantly higher than sea level. ③ The top hip length was lower than sea level at 9-12 gestational weeks, with significant difference between the two groups (P <0.01) There was significant difference between the two groups (P <0.01).