无创产前诊断时代早孕期超声检查的价值

任芸芸

Value of first trimester ultrasound scanning in the era of non-invasive prenatal testing

Yunyun Ren

中华医学超声杂志（电子版） . 2022, (09): 873 -876 . DOI: 10.3877/cma.j.issn.1672-6448.2022.09.001