171例唐氏综合征患者的细胞遗传学分析

本文通过对171例唐氏综合征的细胞遗传学检查，进行外周血染色体核型分析，对导致染色体畸变的诱因进行了调查，在此基础上进行分析和讨论。再次证明染色体畸变是唐氏征的根本原因，而导致染色体畸变的诱因有母亲的年龄，环境等因素，它具有偶发性。我们必须加强孕妇的环境保护，加强唐氏征的预防和筛查工作。

Analysis of cell genetics of 171 Down syndrome in patients

On the basis of discussing and checking cell genetics of 171 Down syndrome, analysising chromosomal karyotypes of peripheral blood lymphocytes in patients, looking into inducing factor leading to chromosome abnormal. The result showed chromosome abnormal is a basis reasons of Down syndrome, It has occasional and inducing factor such as years of morn, environment and so on have an important effect to it. So we must strengthen environment protection of pregnant women, preventing and selectable of Down syndrome.