Fetal cells appear yellow cytoplasmic staining,while adult cells colorless.NRBCs were collected by micromanipulation andwhole genome amplification was performed.

• 显微操作法获取全部阳性细胞后，以其全基因组扩增（PEP）的产物为模板，进行性别检测、DMD基因的多重PCR检测和STR连锁分析。