目的 :了解人胚胎内耳骨迷路的组织发生。方法 :取因故人工流产的胚胎 42例 ,将内耳作石蜡包埋 ,连续切片 ,光镜观察。扫描电镜标本用冷冻割断法 ,观察其割断面的表面结构。结果 :胚胎第 6周蜗管周围的间充质聚集 ,7- 8周变为初软骨 ,9- 12周分化为真性软骨 (透明软骨 ) ,14周骨化开始 ,2 5周骨化完成。结论 :骨迷路的形成是以软骨内成骨的方式进行的 OBJECTIVE: To understand the histological appearance of the bony labyrinth in human embryos. Methods: Forty-two aborted fetuses of induced abortion were made. The inner ear was embedded in paraffin, sliced ​​and observed with light microscope. Scanning electron microscopy specimens were cut by freezing to observe the surface structure of the cut surface. RESULTS: The mesenchyme around the cochlea of ​​the embryo at 6th week was transformed into primary cartilage in the first 7-8 weeks and differentiated into true cartilage (hyaline cartilage) in the 9th to 12th week. The ossification began at 14 weeks and became ossification in 25 weeks. Conclusion: The formation of bony labyrinth is done in the way of endochondral ossification