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Your Baby's Position in Relation to the Pelvis

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Updated May 22, 2014

Pregnancy Ultra-Sound
Tim Hale/Stone/Getty Images
Definition: How far the baby is "down" in the pelvis, measured by the relationship of the fetal head to the ischial spines (sit bones). Measured in negative and positive numbers. -5 is a floating baby, 0 station is said to be engaged in the pelvis, and +5 is crowning.

This is a measurement of fetal descent in labor and is measured by vaginal exams.

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