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Second Stage Fetal Heart Rate Abnormalities and Neonatal Acidosis

From the Department of Obstetrics and Gynecology, Wilford Hall USAF Medical Center, Lackland AFB, San Antonio, Texas

Abstract

Of 403 newborns with either fetal heart rate (FHR) bradycardia or tachycardia during the last ten minutes of the second stage of labor, 20% had an umbilical cord pH of less than 7.20 at birth compared with only 4% of newborns who had a normal FHR during the last ten minutes of labor (P<.0001). Thirty (18%) of 165 neonates with mild bradycardia and 33 (27%) of 121 neonates with moderate to marked bradycardia had cord pH values of less than 7.20 at birth (P<.0001). Of the 117 neonates with tachycardia during the last ten minutes of the second stage, 17 (15%) had a pH of less than 7.20 (P<.0001). There was a significant increase in low cord pH values when FHR variability was absent when compared with normal variability (P<.0001).

This article has been cited by other articles:

				K. P. Williams and F. Galerneau Fetal Heart Rate Parameters Predictive of Neonatal Outcome in the Presence of a Prolonged Deceleration Obstet. Gynecol., November 1, 2002; 100(5): 951 - 954. [Abstract] [Full Text] [PDF]