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诚诚
发表于 2021-5-15 07:26:23
请问无创dna是做几对染色体?
我看sydney ultrasound for woman 的网站上写的是The blood test can detect approximately 99% of babies that have Down syndrome by measuring a subtle increase in fetal DNA originating from the extra copy of chromosome 21 which causes this condition.
然而国际关于这个检测的定义是查18,21,13三种染色体加性染色体的。
有做过拿到讲演的妈妈能说一下吗?谢谢! |
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