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Maternal obesity is a potential source of error in mid-trimester ultrasound estimation of gestational age

Simic, M.; Wahlin, I. A.; Marsal, Karel LU and Källén, Karin LU (2010) In Ultrasound in Obstetrics & Gynecology 35(1). p.48-53
Abstract
Objectives To investigate the possible impact of maternal obesity on ultrasonographic dating of pregnancy. Methods The Swedish Medical Birth Registry was used to identify 842 083 singleton pregnancies for which the estimated date of deliver), (EDD) according to last menstrual period (EDD-LMP) and according to ultrasound examination (EDD-US) and maternal body mass index (BMI) in early pregnancy were known. Dates were adjusted following ultrasound examination, negative adjustment representing pregnancies that were shorter according to ultrasound examination than they were according to LMP. Odds ratios (OR) were adjusted for year of birth, maternal age, parity and smoking. Results The EDD was postponed at least 7 days (discrepancy between... (More)
Objectives To investigate the possible impact of maternal obesity on ultrasonographic dating of pregnancy. Methods The Swedish Medical Birth Registry was used to identify 842 083 singleton pregnancies for which the estimated date of deliver), (EDD) according to last menstrual period (EDD-LMP) and according to ultrasound examination (EDD-US) and maternal body mass index (BMI) in early pregnancy were known. Dates were adjusted following ultrasound examination, negative adjustment representing pregnancies that were shorter according to ultrasound examination than they were according to LMP. Odds ratios (OR) were adjusted for year of birth, maternal age, parity and smoking. Results The EDD was postponed at least 7 days (discrepancy between EDD-LMP and EDD-US of <=-7days) in 25.2% of all pregnancies. There was a statistically significant association between maternal BMI and discrepancy between EDD-LMP and EDD-US. Among pregnant women with a BMI >= 30.0 kg/m(2), the risk of postponed EDD was significantly greater compared with women with a BMI of 20.0-24.9 kg/m(2). The EDD was more often postponed >= 14 days (OR, 1.65; 95% CI, 1.60-1.70) or 7-13 days (OR, 1.45; 95% CI, 1.42-1.48) among women with a BMI >= 30 kg/m(2) than among women with normal weight. Similar risk was observed among women with a BMI of 25.0-29.9 kg/m(2), but was less pronounced. Conclusions High maternal BMI increases the risk of postponing the EDD at mid-trimester ultrasound examination. Copyright (c) 2009 ISUOG. Published by John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ultrasound, pregnancy dating, pregnancy, maternal obesity, estimated date of delivery, fetus
in
Ultrasound in Obstetrics & Gynecology
volume
35
issue
1
pages
48 - 53
publisher
John Wiley & Sons
external identifiers
  • wos:000273679800009
  • scopus:74049106543
ISSN
1469-0705
DOI
10.1002/uog.7502
language
English
LU publication?
yes
id
c06d4831-e819-4595-8e90-290b205a3caf (old id 1547405)
date added to LUP
2010-02-23 15:18:08
date last changed
2018-05-29 10:55:21
@article{c06d4831-e819-4595-8e90-290b205a3caf,
  abstract     = {Objectives To investigate the possible impact of maternal obesity on ultrasonographic dating of pregnancy. Methods The Swedish Medical Birth Registry was used to identify 842 083 singleton pregnancies for which the estimated date of deliver), (EDD) according to last menstrual period (EDD-LMP) and according to ultrasound examination (EDD-US) and maternal body mass index (BMI) in early pregnancy were known. Dates were adjusted following ultrasound examination, negative adjustment representing pregnancies that were shorter according to ultrasound examination than they were according to LMP. Odds ratios (OR) were adjusted for year of birth, maternal age, parity and smoking. Results The EDD was postponed at least 7 days (discrepancy between EDD-LMP and EDD-US of &lt;=-7days) in 25.2% of all pregnancies. There was a statistically significant association between maternal BMI and discrepancy between EDD-LMP and EDD-US. Among pregnant women with a BMI &gt;= 30.0 kg/m(2), the risk of postponed EDD was significantly greater compared with women with a BMI of 20.0-24.9 kg/m(2). The EDD was more often postponed &gt;= 14 days (OR, 1.65; 95% CI, 1.60-1.70) or 7-13 days (OR, 1.45; 95% CI, 1.42-1.48) among women with a BMI &gt;= 30 kg/m(2) than among women with normal weight. Similar risk was observed among women with a BMI of 25.0-29.9 kg/m(2), but was less pronounced. Conclusions High maternal BMI increases the risk of postponing the EDD at mid-trimester ultrasound examination. Copyright (c) 2009 ISUOG. Published by John Wiley &amp; Sons, Ltd.},
  author       = {Simic, M. and Wahlin, I. A. and Marsal, Karel and Källén, Karin},
  issn         = {1469-0705},
  keyword      = {ultrasound,pregnancy dating,pregnancy,maternal obesity,estimated date of delivery,fetus},
  language     = {eng},
  number       = {1},
  pages        = {48--53},
  publisher    = {John Wiley & Sons},
  series       = {Ultrasound in Obstetrics & Gynecology},
  title        = {Maternal obesity is a potential source of error in mid-trimester ultrasound estimation of gestational age},
  url          = {http://dx.doi.org/10.1002/uog.7502},
  volume       = {35},
  year         = {2010},
}