对孕妇做唐氏综合症筛查或只需一次简单的血检即可，而不必再采用创伤性诊断法。

A simple blood test for Down's syndrome could provide an alternative to invasive testing in pregnant women.

youdao

对孕妇做唐氏综合症筛查或只需一次简单的血检即可，而不必再采用创伤性诊断法。

A simple blood test for Down's syndrome could provide an alternative to invasive testing in pregnant women.

youdao