| When to induce labor for post-term? A study of induction at 41 weeks versus 42 weeks. | |
MedLine Citation:
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PMID: 16139416 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
Authors:
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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:
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Type: Comparative Study; Evaluation Studies; Journal Article Date: 2005-08-31 |
Journal Detail:
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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:
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Created Date: 2006-04-03 Completed Date: 2006-09-18 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0375672 Medline TA: Eur J Obstet Gynecol Reprod Biol Country: Ireland |
Other Details:
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Languages: eng Pagination: 206-10 Citation Subset: IM |
Affiliation:
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Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Princes of Wales Hospital, Shatin, Hong Kong. angelfok@cuhk.edu.hk |
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| MeSH Terms | |
Descriptor/Qualifier:
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Female Gestational Age* Hong Kong Humans Infant, Newborn Infant, Postmature* Labor, Induced* / methods, statistics & numerical data Pregnancy Retrospective Studies Treatment Outcome |
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