为了探讨线粒体在胎儿输卵管上皮细胞发育中的变化特征，应用体视学方法检测了胎龄１６～３６周胎儿输卵管上皮细胞线粒体的体密度、数密度、平均体积、表面积密度、表面积体积比、平均表面积。结果显示，胎龄２０周前，峡部上皮细胞线粒体的体密度与３０周后的近似（Ｐ＞００５），即大于２０～２９周的（Ｐ＜００５），２０周前峡部线粒体平均体积和平均表面积均较大，而３０周后数密度和表面积密度较大。壶腹部上皮细胞线粒体体密度、平均体积、数密度在３０周前不同孕期间较接近（Ｐ＞００５），３０周后出现明显改变。伞部线粒体体密度、数密度在２０～２９周期间增大（Ｐ＜００５）。峡部和壶腹部线粒体体密度分别在２０周前及３０周前较大，伞部线粒体体密度仅在２０～２９周较大，上述结果表明线粒体占上皮细胞体积之比因部位和孕期而异，提示胎儿输卵管上皮细胞发育的部位差异和阶段性 To investigate the changes of mitochondria in the development of fetal oviduct epithelial cells, the body density, number density, average volume, surface area density, surface area and volume ratio of mitochondria in fetal oviduct epithelial cells at 16-36 weeks of gestational age were detected by stereological methods. Surface area. The results showed that the body density of isthmic epithelium mitochondria was similar to that at 30 weeks (P> 005), ie, greater than 20 to 29 weeks (P <005) The average volume and the average surface area are larger, while the number density and surface area density are greater after 30 weeks. The density, average volume and number density of mitochondria of ampulla epithelial cells were similar in different gestational periods before 30 weeks (P> 005), and obviously changed after 30 weeks. The mitochondrial body density and number density of umbrella increased from 20 to 29 weeks (P <005). The mitochondrial body density in the isthmus and ampulla was larger than before 20 weeks and 30 weeks before, and mitochondrial body density at the umbrella part was only larger in 20 to 29 weeks. The above results indicated that the ratio of the mitochondria to the epithelial cell volume varies with the site and during pregnancy, Prompt fetal fallopian tube epithelial cell development site differences and stage