这个词是什么意思？
A method for diagnosis of fetal diseases by sampling the cells of the placental chorionic villi for DNA analysis, presence of bacteria, concentration of metabolites, etc. The advantage over amniocentesis is that the procedure can be carried out in the first trimester.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D015193 · MeSH 2026。
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