true conjugate

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true conjugate

[TA]
the diameter that represents the shortest diameter through which the head must pass in descending into the superior strait and measures, by means of x-ray, the distance from the promontory of the sacrum to a point on the inner surface of the symphysis a few millimeters below its upper margin.
Farlex Partner Medical Dictionary © Farlex 2012

true conjugate

In obstetrics, the distance between the midline superior point of the sacrum and the upper margin of the symphysis pubis. It is the anteroposterior diameter of the pelvic inlet, estimated by subtracting 1.5 to 2 cm from the measurement of the diagonal conjugate.
Synonym: conjugata vera
See also: conjugate
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
In this study, on the basis of literature [15, 16], transverse diameters (dorsal transverse, intermediary transverse, ventral transverse, cranial transverse, caudal transverse, and medial transverse diameters), oblique diameters (right oblique diameter, left oblique diameter, right sacrocotyloid diameter, and left sacrocotyloid diameter), conjugate diameters (conjugata vera and conjugata diagonalis), vertical diameter, pelvic inclination, and angle between arcus ischiadicus were measured (as shown in Figures 2-5).
(11) Conjugata vera: line/diameter drawn from the tip of the sacral promontory to the cranial end of the symphysis pelvina/pubis (Figure 5).
When Table 1 is investigated, a difference (P < 0.05) was determined between dorsal transverse, cranial transverse, caudal transverse, medial transverse, right oblique, and left oblique diameters, conjugata vera, conjugata diagonalis, vertical diameter, and inclinatio pelvis and the angle between arcus ischiadicus from measurement values of pelvic cavity belongs to male and female rabbits.