Document Detail

The impact of parity on course of labor in a contemporary population.
MedLine Citation:
PMID:  16499527     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Few studies have examined in depth the labor progression of multiparas to determine if there is any additional impact of being parous beyond the first birth. The objective of this study was to determine the effect of parity on labor progression in contemporary obstetric practice. METHODS: Our sample consisted of all low-risk women who delivered a term, live-born infant from January 2002 to March 2004 at a single institution in Delaware, United States (n = 5,589). The median duration of labor by each centimeter of cervical dilation was computed for parity = 0 (n = 2,645); parity = 1 (n = 1,839); parity = 2 (n = 750); and parity = 3 + (n = 355). RESULTS: Multiparas had a significantly faster labor progression from 4 to 10 cm (293, 300, and 313 min, respectively, for parity = 1, parity = 2, and parity = 3 +), compared with nulliparas (383 min for parity = 0), as well as a shorter second stage of labor. However, no significant differences were found in duration of the active phase or the second stage of labor among multiparas. CONCLUSIONS: Additional childbearing appears to have no effect of on the progression of labor among multiparous subgroups. The difference in duration of the active phase between nulliparas and multiparas is substantially smaller in a contemporary population.
Anjel Vahratian; Matthew K Hoffman; James F Troendle; Jun Zhang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Birth (Berkeley, Calif.)     Volume:  33     ISSN:  0730-7659     ISO Abbreviation:  Birth     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-02-27     Completed Date:  2006-07-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8302042     Medline TA:  Birth     Country:  United States    
Other Details:
Languages:  eng     Pagination:  12-7     Citation Subset:  IM    
Division of Epidemiology, Statistics, and Prevention Research, National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA.
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MeSH Terms
Labor Stage, First / physiology
Labor Stage, Second / physiology
Labor Stage, Third / physiology
Medical Records*
Parity / physiology*
Retrospective Studies
Risk Factors
Time Factors
Trial of Labor*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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