Document Detail

When to induce labor for post-term? A study of induction at 41 weeks versus 42 weeks.
MedLine Citation:
PMID:  16139416     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To evaluate the pregnancy outcomes of two policies of timing of induction of labor for post-term pregnancies. STUDY DESIGN: It is a retrospective study in a University obstetric unit from 1997 to 2002. Five thousand eight hundred and ninety-two singleton, cephalic pregnancies with gestational age at delivery at or more than 41 completed weeks were studied. They were divided into two groups. Group A included women who delivered from January 1997 to February 1999 when the policy of the department was to induce labor for post-maturity at 42 weeks of gestation. Group B included those delivered between March 1999 and December 2002 when the timing of induction for post-term was advanced to 41 weeks. The intrapartum characteristics, delivery and perinatal outcomes were analyzed by Student's t-test and Chi-square test for continuous and categorical variables, respectively. RESULTS: Two thousand one hundred and seventy-six women were studied in Group A and 3716 in Group B. Twenty-nine percent of these pregnancies in Group A required induction of labor whereas 20.3% were for post-term. In Group B, 58% of pregnancies had labor induction and 55% for post-maturity. For the pregnancies undergoing induction of labor for post-term, both the duration of labor (P<0.001) and the need of intrapartum epidural analgesia were increased (OR 1.3, 95% CI: 1.0-1.6) in Group B. However, there was no significant difference in the mode of delivery, apgar scores and stillbirths between the two study periods. CONCLUSION: Compared to routine induction at 42 weeks, induction at 41 weeks is associated with a significantly higher risk of use of medical interventions and associated complications, with no observable benefits.
Wing Yee Fok; Louis Yik-Si Chan; Michelle Hang Yuet Tsui; Tse Ngong Leung; Tze Kin Lau; Tony Kwok Hung Chung
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article     Date:  2005-08-31
Journal Detail:
Title:  European journal of obstetrics, gynecology, and reproductive biology     Volume:  125     ISSN:  0301-2115     ISO Abbreviation:  Eur. J. Obstet. Gynecol. Reprod. Biol.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-03     Completed Date:  2006-09-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375672     Medline TA:  Eur J Obstet Gynecol Reprod Biol     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  206-10     Citation Subset:  IM    
Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Princes of Wales Hospital, Shatin, Hong Kong.
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MeSH Terms
Gestational Age*
Hong Kong
Infant, Newborn
Infant, Postmature*
Labor, Induced* / methods,  statistics & numerical data
Retrospective Studies
Treatment Outcome

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

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