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the location of the presenting part of the fetus in the birth canal, designated as −5 to −1 according to the number of centimeters the part is above an imaginary plane passing through the ischial spines, 0 when at the plane, and +1 to +5 according to the number of centimeters the part is below the plane.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
The degree of descent of the presenting part of the fetus through the maternal pelvis, as measured in relation to the ischial spines of the maternal pelvis.
Farlex Partner Medical Dictionary © Farlex 2012
stationObstetrics The position or level of descent of the presenting part in the pelvis in a vaginal delivery; full engagement of the presenting part at the iliac spines is considered station 'zero'
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.