Narrow pelvis

The pelvic diameter is too short or the shape is abnormal, causing the pelvic cavity to be smaller than the limit of the exposed part of the fetus, which prevents the exposed part of the fetus from falling and affects the smooth progress of the labor process. It is called stenosis pelvis. The narrow pelvis can be too short in one radial line or too short in multiple radial lines, or narrowed in one plane or narrowed in multiple planes at the same time. When a radial line is narrow, the size of other radial lines in the same plane should be observed, and then the size and shape of the entire pelvis should be comprehensively analyzed to make a correct judgment.

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