Objective To study the fetal DNA in maternal plasma using multiplex PCR amplification of the short tandem repent (STR) systems.
目的采用短串联重复序列（STR）多态位点的复合扩增方法，研究孕妇血浆中胎儿DNA基因型。
Conclusion: By co amplification using fluorescently labeled STR primers and detecting using PE310 genetic analyzer, the PCR products of these nine loci can be significantly distinguished.
结论：采用荧光标记引物进行复合扩增，结合PE310遗传分析仪自动分析，可以有效地区分各位点的扩增产物。
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