由于从母亲的循环系统中获取胎儿细胞进行产前诊断可以避免损伤性取样的过程，所以将成为一种很重要的方法。在分离稀有的胎儿细胞上很多学者已经做了许多努力，且已报道了许多此方面的成功经验。虽然为将此方法应用于临床，很需要发展一种可靠的分离方法，但更为重要的是发展 Since acquiring fetal cells from the mother’s circulatory system for prenatal diagnosis avoids the process of invasive sampling, it will be an important method. Many scholars have done a lot of efforts in isolating rare fetal cells and have reported many successful experiences in this field. Although it is necessary to develop a reliable separation method for applying this method to clinical practice, it is even more important to develop