Document Detail

Skewed fetal gender distribution in prolonged pregnancy: a fallacy with consequences.
MedLine Citation:
PMID:  12666221     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Skewed gender distribution and falsely assigned gestational age lead to unnecessary or late obstetric intervention in prolonged pregnancy. The aim of this study was to examine the consequences of a fetal gender-dependent systematic 1.5-day dating error at ultrasound fetometry. MATERIAL AND METHODS: A total of 82 484 singleton deliveries >/=37 weeks at 11 hospitals in southern Sweden from 1995 to 2000 were included. Frequencies of labor induction and Apgar scores <7 at 5 min were compared with regard to fetal gender, both before and after correction of gestational age by adding 0.75 days to female-fetus pregnancies and subtracting 0.75 days from male-fetus pregnancies. RESULTS: The uncorrected odds ratio for having a male baby at >/=42 weeks was 1.41 (95% confidence interval, 1.33-1.49). After adjusting gestational age by +/-0.75 days, the odds ratio reduced to 0.90 (95% confidence interval, 0.84-0.95). The risk for labor induction was significantly above unity in male-fetus pregnancies delivered after 41 weeks when gestational age was corrected for fetal gender, while the risk for female fetuses having a low Apgar score was not significantly increased compared to male fetuses (P = 0.087). CONCLUSION: Skewed gender distribution in prolonged pregnancy results in a higher rate of labor induction in pregnancies with male fetuses at >/=41 weeks, and the risk for newborn females having a low Apgar score in prolonged pregnancy is not significantly increased compared to boys.
M Kitlinski Laczna; K Källén; K Marsál; P Olofsson
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  21     ISSN:  0960-7692     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-03-31     Completed Date:  2003-05-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  262-6     Citation Subset:  IM    
Copyright Information:
Copyright 2003 ISUOG. Published by John Wiley & Sons, Ltd.
Perinatal Revision South Registry, University Hospital of Malmö, Sweden.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Diagnostic Errors
Gestational Age
Infant, Newborn
Labor, Induced
Odds Ratio
Pregnancy, Prolonged / physiology*
Risk Factors
Sex Ratio*

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

Previous Document:  Fetal brain/liver volume ratio and umbilical volume flow parameters relative to normal and abnormal ...
Next Document:  Minimal invasive complete excision of benign breast tumors using a three-dimensional ultrasound-guid...