染色体病的产前诊断是对宫内胎儿进行有或无染色体异常的诊断。近年来随着产前诊断技术不断更新和完善,尤其是分子生物学新技术的发展,使越来越多的染色体异常在胚胎发育的不同阶段用不同手段能够准确、安全地检测出来。因此,积极开展产前监测和产前诊断对于提高人口素质,具有 Chromosomal prenatal diagnosis of disease is intrauterine fetal diagnosis with or without chromosomal abnormalities. In recent years, with the continuous updating and improvement of prenatal diagnostic techniques, especially the development of new molecular biology techniques, more and more chromosomal abnormalities can be accurately and safely detected by different means at different stages of embryonic development. Therefore, to actively carry out prenatal monitoring and prenatal diagnosis to improve the quality of the population