## What is obstetric conjugate?

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Pelvic inlet: The obstetrical conjugate is the distance between the sacral promontory and the inner pubic arch; it should measure 11.5 cm or more. The diagonal conjugate is the distance from the undersurface of the pubic arch to sacral promontory; it is 2 cm longer than the obstetrical conjugate.

**How is obstetric conjugate determined?**

n. The shortest pelvic diameter through which the fetal head must pass during birth, measured from the promontory of the sacrum to a point a few millimeters from the top of the pubic symphysis.

**What is the true or gynecologic 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.

### Can obstetric conjugate be measured clinically?

The pelvic inlet can be evaluated clinically for its anteroposterior diameter. The obstetric conjugate can be estimated from the diagonal conjugate, which is obtained during clinical examination (seeFigure 8-3).

**How do you find the true conjugate?**

The true conjugate can be estimated by subtracting 1.5 to 2 cm from the diagonal conjugate. This distance represents the smallest diameter of the inlet and is normally 11 cm or more (Figure 131-1A).

**What is obstetric outlet?**

Plane of obstetric outlet (plane of least pelvic dimensions): passes from the lower border of the symphysis pubis anteriorly, to the ischial spines laterally, to the tip of the sacrum posteriorly.

## Which pelvis is best for delivery?

gynecoid pelvis

Gynecoid. The gynecoid pelvis is thought to be the most favorable pelvis type for a vaginal birth. This is because the wide, open shape give the baby plenty of room during delivery.

**What is external conjugate?**

The distance in a straight line between the depression under the last spinous process of the lumbar vertebrae and the upper edge of the pubic symphysis.

**What is obstetric conjugate true conjugate?**

obstetric conjugate 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.

### What is the size of the obstetric conjugate diameter?

The mean of the obstetric conjugate diameterwas 11.05 cm (CI 95% 11 to 11.1), with a standard error of the mean of 0.02, a variance of 0.12 and standard deviation of 0.4.

**What is the most important conjugate sulphate in obstetrics?**

She is the only midwife for whom an obstetric maneuver has been named (Gaskin maneuver). By far the most important of the conjugate sulphates and representative of the group is potassium indoxyl sulphate. I had an old maid English teacher when I was a boy who made us conjugate to like instead of the more intimate and tender word.

**What is true conjugate (Ta)?**

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.