唐氏综合征(Down’s syndrome)又称先天愚型,是小儿智能发育不全最常见的一种临床类型,也是儿童最常见的一种染色体异常综合征。我们对1090例经染色体分析确诊的先天愚型进行核型及相关因素分析。1对象和方法从1982年至2005年5月来我室就诊的先天愚型患者共1090例;采用外周血淋 Down’s syndrome, also known as Down’s syndrome, is the most common type of childhood hypoplasia and is the most common chromosomal abnormality syndrome in children. We analyzed karyotypes and related factors in 1090 idiopathic confirmed by chromosomal analysis. 1 objects and methods from 1982 to May 2005 to our room for treatment of patients with idiopathic total of 1090 cases; the use of peripheral bloodshed