TY - JOUR
T1 - Stress hormones and acid-base status of human fetuses at delivery
AU - Ramin, Susan M.
AU - Porter, John C.
AU - Gilstrap, Larry C.
AU - Rosenfeld, Charles R.
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1991/7
Y1 - 1991/7
N2 - The relationship of plasma concentrations of arginine vasopressin (AVP), ACTH, cortisol, and PRL in the human fetus to mode of delivery and acid-base status has been investigated in 91 term pregnancies consisting of 4 groups based on mode of delivery, type of anesthesia, and use of ephedrine prophylaxis for maternal blood pressure control. Infants delivered vaginally after uncomplicated labors had higher umbilical cord plasma concentrations of AVP, ACTH, and cortisol than infants delivered without labor. Use of ephedrine, an a-agonist, during regional anesthesia was associated with elevated plasma AVP and ACTH concentrations compared to those in women receiving general anesthesia. At the time of delivery, 12 infants had acidemia (pH <7.20), as judged by pH of umbilical arterial blood. Their plasma AVP, ACTH, and cortisol levels did not differ from those of infants delivered by uncomplicated vaginal delivery, but were greater than those of infants delivered by cesarean section under general anesthesia. Moreover, in infants with acidemia, plasma concentrations of AVP and ACTH were significantly correlated, but PRL levels were unaffected by mode of delivery or acidemia. Elevated umbilical cord plasma concentrations of AVP, ACTH, and cortisol characterize term vaginal deliveries and are associated with intrauterine stress, demonstrating activation of the fetal hypothalamic-pituitary-adrenal axis and suggesting that AVP is important in ACTH release in the human fetus; however, PRL does not appear to be an important stress hormone.
AB - The relationship of plasma concentrations of arginine vasopressin (AVP), ACTH, cortisol, and PRL in the human fetus to mode of delivery and acid-base status has been investigated in 91 term pregnancies consisting of 4 groups based on mode of delivery, type of anesthesia, and use of ephedrine prophylaxis for maternal blood pressure control. Infants delivered vaginally after uncomplicated labors had higher umbilical cord plasma concentrations of AVP, ACTH, and cortisol than infants delivered without labor. Use of ephedrine, an a-agonist, during regional anesthesia was associated with elevated plasma AVP and ACTH concentrations compared to those in women receiving general anesthesia. At the time of delivery, 12 infants had acidemia (pH <7.20), as judged by pH of umbilical arterial blood. Their plasma AVP, ACTH, and cortisol levels did not differ from those of infants delivered by uncomplicated vaginal delivery, but were greater than those of infants delivered by cesarean section under general anesthesia. Moreover, in infants with acidemia, plasma concentrations of AVP and ACTH were significantly correlated, but PRL levels were unaffected by mode of delivery or acidemia. Elevated umbilical cord plasma concentrations of AVP, ACTH, and cortisol characterize term vaginal deliveries and are associated with intrauterine stress, demonstrating activation of the fetal hypothalamic-pituitary-adrenal axis and suggesting that AVP is important in ACTH release in the human fetus; however, PRL does not appear to be an important stress hormone.
UR - http://www.scopus.com/inward/record.url?scp=0025739486&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025739486&partnerID=8YFLogxK
U2 - 10.1210/jcem-73-1-182
DO - 10.1210/jcem-73-1-182
M3 - Article
C2 - 1646216
AN - SCOPUS:0025739486
VL - 73
SP - 182
EP - 186
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
SN - 0021-972X
IS - 1
ER -