Pelvic Diameter Measurement in Gravid Women

This question asks to identify which specific pelvic diameter can be measured directly using an examining finger during a pelvic assessment of a woman at term pregnancy.

Measurable Pelvic Diameter

The diagonal conjugate is the correct answer because it is the only dimension among the options that can be directly palpated and measured by the examiner's fingers.

This measurement spans from the inferior posterior border of the pubic symphysis to the sacrococcygeal junction.

Diameters Not Directly Measured

The true conjugate and the obstetric conjugate, which relate to the anteroposterior diameter of the pelvic inlet, cannot be measured directly via digital examination.

The obstetric conjugate is clinically significant as the shortest AP diameter, but it is typically estimated based on the diagonal conjugate measurement, not measured directly.

Therefore, the diagonal conjugate is the specific diameter assessable by digital palpation in this clinical scenario.