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目的：了解维吾尔族和汉族两民族正常胎儿胸腺发育的状况及差异。方法：测定乌鲁木齐市维吾尔族和汉族引产的１８９例３～８ 个月龄胎儿胸腺的重量。按受精日期计算月龄，胎儿尸体固定数天后，用解剖法取出胸腺进行称重。结果：两民族胎儿胸腺的重量在胚胎３～８个月时，大体上按月成倍地增加。在胎龄３ 个月时两民族胎儿胸腺的重量相同，但从第４ 个月起维吾尔族胎儿的胸腺略大于同龄汉族胎儿的胸腺，特别是７、８ 个月时差异有显著性（Ｐ＜ ０．０５）。结论：在７ 个月以后维吾尔族胎儿胸腺重量显著大于同龄的汉族胎儿胸腺重量，但３～６ 个月时胸腺重量相差不大。
Objective: To understand the status and differences of normal fetal thymus development between Uygur and Han nationalities. Methods: The weight of 189 cases of 3-7 months old fetal thymus of Uygur and Han induced abortion in Urumqi were measured. According to the fertilization date to calculate the age of the fetus, a few days after the fetus was fixed, remove the thymus by dissection method for weighing. Results: The weight of the two ethnic fetuses’ thymus increased exponentially month by month at 3-8 months of embryo. At the third month of gestational age, the weight of thymus in both ethnic fetuses is the same, but the thymus of Uyghur fetuses is slightly larger than the thymus of Han fetuses of the same age from the fourth month, especially at 7 and 8 months (P < 0.05). Conclusion: The thymus weight of Uygur fetus is significantly larger than that of the same age fetus after 7 months, but the weight of thymus is not much difference between 3 and 6 months.