这个词是什么意思？
The position or orientation of the FETUS at near term or during OBSTETRIC LABOR, determined by its relation to the SPINE of the mother and the birth canal. The normal position is a vertical, cephalic presentation with the fetal vertex flexed on the NECK.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D007746 · MeSH 2026。
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