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Obstetrics & Gynecology 1975;45:292-298
© 1975 by The American College of Obstetricians and Gynecologists
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A Study of Fetal Heart Rate Deceleration Areas

II. Correlation Between Deceleration Areas and Fetal pH During Labor

F. BEGUIN, MD, S-Y YEH, MD, A. FORSYTHE, PhD and E H HON, MD, FACOG

From the Department of Obstetrics and Gynecology. Los Angeles County–University of Southern California Medical Center Women's Hospital. Los Angeles, California

Abstract

Three FHR deceleration areas of fixed durations related to the onset of the concomitant uterine contraction were evaluated automatically with a small digital computer during labor. The correlations between these areas and the fetal scalp blood pH values were studied. The deceleration occurring 80 to 140 seconds after the onset of each uterine contraction during the 20 minutes preceding the fetal blood sampling presented the best correlation (r = –0.453) with fetal pH values. In addition to FHR deceleration area, baseline FHR variability should be considered in predicting fetal condition.






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Copyright © 1975 by the American College of Obstetricians and Gynecologists.