Zlatnik F J, Brown R C, Abu-Yousef M M, Burmeister L F
J Reprod Med. 1985 Sep;30(9):677-80.
The aim of this study was to compare the radiologic appearance of the upper cervical canal at hysterography between a group of women with a history of premature delivery and a control group. A standardized technique was used that corrects for the magnification inherent in taking measurements directly from the x-ray films. Some women with a history of premature delivery had abnormally wide upper cervical canals in the nonpregnant state. Premature labor might not have been an acute pregnancy-specific event in those women but might have been a reflection of an underlying abnormality.
本研究的目的是比较一组有早产史的女性与对照组在子宫输卵管造影时上颈椎管的放射学表现。采用了一种标准化技术，该技术可校正直接从X线片测量时固有的放大率。一些有早产史的女性在非妊娠状态下上颈椎管异常宽阔。早产在这些女性中可能并非急性的特定妊娠事件，而可能是潜在异常的一种反映。
