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名詞

midpelvis (複数形 midpelvises)

1. (anatomy) A pelvic plane defined by the ischial spines, the lower edge of the pubic symphysis, and the boundary of the fourth and fifth sacral vertebra.
   • 1963 May 1, David N. Danforth, Averon H. Ellis, “Midforceps delivery—a vanishing art?”, in American Journal of Obstetrics and Gynecology, volume 86, number 1, →DOI, page 32:

     At the midpelvis, transverse narrowing may result either from convergent sidewalls or prominent spines or both.

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