In a First Birth, the Average Length of Active Labor

question 22

Multiple Choice

In a first birth, the average length of active labor is _____.

• A) several days
• B) about 12 hours
• C) about 8 hours
• D) a few minutes

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Definitions:

Frustum

A truncated shape that results from cutting a pyramid or cone with a plane parallel to its base, leaving two bases, one smaller than the other.

Pitch Angle

The angle between the helix of a thread or gear on a cylindrical shaft and an imaginary line perpendicular to the shaft's axis.

Pitch Cone

The imaginary cone that defines the pitch surface of conical gears or screw threads, where the common vertex of the gear teeth or threads would converge.

Cone Angle

The angle formed between the outer surfaces of a cone, measured at its widest part.