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Association between Maternal Serum Hormones along the Maternal-Fetal Hypothalamic-Pituitary-Adrenal Axis and Successful Vaginal Delivery Measured Prior to Labor Induction.

Abstract：

OBJECTIVE:This study aimed to evaluate if maternal serum hormones along the maternal-fetal hypothalamic-pituitary-adrenal (HPA) axis, when drawn prior to labor induction, differed between women who delivered vaginally and those who underwent cesarean. STUDY DESIGN:This was a prospective observational study at a single perinatal center performed from August 2017 to May 2018. Nulliparous women with uncomplicated singleton pregnancies ≥39 weeks had maternal serum collected prior to induction. Corticotrophin-releasing hormone (CRH) was measured by ELISA; dehydroepiandrosterone sulfate (DHEA-S), cortisol, estriol (E3) estradiol (E2), and progesterone (P4) were measured by chemiluminescent reaction. Mean analyte concentrations as well as three ratios (E2/P4, E3/P4, and E2/E3) were compared between women who had a vaginal versus cesarean delivery. Logistic regression was used to model the relationship between CRH and the odds of vaginal birth. We estimated that a sample size of 66 would have 90% power to detect a 25% difference in mean CRH levels assuming a vaginal:cesarean ratio of 2:1 with a baseline CRH concentration of 140 (standard deviation = 36) pg/mL. RESULTS:Of the 88 women who had their serum analyzed, 27 (31%) underwent cesarean. Mean maternal serum CRH levels were similar between the vaginal delivery and cesarean groups (122.6 ± 95.2 vs. 112.3 ± 142.4, p = 0.73). Similarly, there were no significant differences in any other maternal serum analytes or ratios. Logistic regression showed a nonsignificant odds ratio for successful vaginal birth (p = 0.69) even when evaluating only the 16 women who had a cesarean for an arrest disorder (p = 0.08). CONCLUSION:In low-risk nulliparous women undergoing full-term labor induction, there were no differences noted in a broad array of other maternal-fetal HPA-axis hormones between women who had a vaginal or cesarean delivery.

journal_name

Am J Perinatol

journal_title

American journal of perinatology

authors

Cawyer CR,Lobashevksy E,Corley-Topham G,Anderson S,Owen J,Subramaniam A

doi

10.1055/s-0040-1708801

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

1195-1200

issue

eissn

0735-1631

issn

1098-8785

journal_volume

pub_type

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Association between Maternal Serum Hormones along the Maternal-Fetal Hypothalamic-Pituitary-Adrenal Axis and Successful Vaginal Delivery Measured Prior to Labor Induction.