本文对９～４１周的１９３例胎尸的脊髓与脊柱进行了观察测量：求得了二者在８个相应时期的增长数据；对二者各部位的发育作了对比分析；对脊髓的发育进行了性别的对比。结果表明：脊髓与脊柱的增长率大不相同，脊髓增长了３．８５倍，而脊柱增长了５．１７倍，以至二者的长度差从９周的５．７５ｍｍ，增加到出生前的８３．６０ｍｍ。二者的发育不仅存在着时限阶段的不平衡性，而且也存在着部位的不平衡性。脊髓发育的性别差异不明显。 In this paper, we observed and measured the spinal cord and spine of 193 cadaveric fetuses from 9 to 41 weeks: obtained the growth data of the two in eight corresponding periods; compared the development of the two parts; conducted the development of the spinal cord Gender comparison. The results showed that the rate of spinal cord and spinal cord growth varied greatly, the spinal cord increased 3.85 times, while the spine increased 5.17 times, so that the length difference between the two from 9 weeks of 5.75mm, increased to 83 before birth .60mm. The development of both the existence of not only the time period of the imbalance, but there are also parts of the imbalance. Gender differences in spinal cord development were not significant.