产前诊断又称宫内诊断或出生前诊断,是在遗传咨询的基础上,应用各种先进的科学技术手段了解胎儿在子宫内生长发育状况,如观察胎儿外形、分析胎儿染色体核型、检测基因和基因产物等,以对胎儿是否有某些遗传缺陷及先天畸形做出诊断,这是实现优生、预防患儿出生、提高出生人口素质 Prenatal diagnosis, also known as intrauterine diagnosis or prenatal diagnosis, is based on genetic counseling, the use of advanced scientific and technological means to understand the fetus in the uterus growth and development status, such as observation of fetal shape, analysis of fetal karyotype, detection Genes and gene products, in order to check whether the fetus has some genetic defects and congenital malformations, which is to achieve eugenics, prevent the birth of children, improve the quality of birth population