这个词是什么意思？
Determination of the nature of a pathological condition or disease in the OVUM; ZYGOTE; or BLASTOCYST prior to implantation. CYTOGENETIC ANALYSIS is performed to determine the presence or absence of genetic disease.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D019836 · MeSH 2026。
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