Document Detail

Changes in labor patterns over 50 years.
MedLine Citation:
PMID:  22542117     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The objective of the study was to examine differences in labor patterns in a modern cohort compared with the 1960s in the United States.
STUDY DESIGN: Data from pregnancies at term, in spontaneous labor, with cephalic, singleton fetuses were compared between the Collaborative Perinatal Project (CPP, n = 39,491 delivering 1959-1966) and the Consortium on Safe Labor (CSL; n = 98,359 delivering 2002-2008).
RESULTS: Compared with the CPP, women in the CSL were older (26.8 ± 6.0 vs 24.1 ± 6.0 years), heavier (body mass index 29.9 ± 5.0 vs 26.3 ± 4.1 kg/m(2)), had higher epidural (55% vs 4%) and oxytocin use (31% vs 12%), and cesarean delivery (12% vs 3%). First stage of labor in the CSL was longer by a median of 2.6 hours in nulliparas and 2.0 hours in multiparas, even after adjusting for maternal and pregnancy characteristics, suggesting that the prolonged labor is mostly due to changes in practice patterns.
CONCLUSION: Labor is longer in the modern obstetrical cohort. The benefit of extensive interventions needs further evaluation.
S Katherine Laughon; D Ware Branch; Julie Beaver; Jun Zhang
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Intramural     Date:  2012-03-10
Journal Detail:
Title:  American journal of obstetrics and gynecology     Volume:  206     ISSN:  1097-6868     ISO Abbreviation:  Am. J. Obstet. Gynecol.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-04-30     Completed Date:  2012-07-27     Revised Date:  2013-06-25    
Medline Journal Info:
Nlm Unique ID:  0370476     Medline TA:  Am J Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  419.e1-9     Citation Subset:  AIM; IM    
Copyright Information:
Published by Mosby, Inc.
Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA.
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MeSH Terms
Age Factors
Body Mass Index
Delivery, Obstetric / methods,  statistics & numerical data,  trends*
Labor Stage, First
Labor Stage, Second
Labor, Obstetric / physiology*
Linear Models
Multivariate Analysis
Physician's Practice Patterns
Pregnancy Outcome
Retrospective Studies
Time Factors
United States
Grant Support
HHSN267200603425C/HD/NICHD NIH HHS; HHSN267200603425C//PHS HHS; Z99 HD999999/HD/NICHD NIH HHS

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