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Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester.

Publication ,  Journal Article
Hoffman, CS; Messer, LC; Mendola, P; Savitz, DA; Herring, AH; Hartmann, KE
Published in: Paediatric and perinatal epidemiology
November 2008

Reported last menstrual period (LMP) is commonly used to estimate gestational age (GA) but may be unreliable. Ultrasound in the first trimester is generally considered a highly accurate method of pregnancy dating. The authors compared first trimester report of LMP and first trimester ultrasound for estimating GA at birth and examined whether disagreement between estimates varied by maternal and infant characteristics. Analyses included 1867 singleton livebirths to women enrolled in a prospective pregnancy cohort. The authors computed the difference between LMP and ultrasound GA estimates (GA difference) and examined the proportion of births within categories of GA difference stratified by maternal and infant characteristics. The proportion of births classified as preterm, term and post-term by pregnancy dating methods was also examined. LMP-based estimates were 0.8 days (standard deviation = 8.0, median = 0) longer on average than ultrasound estimates. LMP classified more births as post-term than ultrasound (4.0% vs. 0.7%). GA difference was greater among young women, non-Hispanic Black and Hispanic women, women of non-optimal body weight and mothers of low-birthweight infants. Results indicate first trimester report of LMP reasonably approximates gestational age obtained from first trimester ultrasound, but the degree of discrepancy between estimates varies by important maternal characteristics.

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Published In

Paediatric and perinatal epidemiology

DOI

EISSN

1365-3016

ISSN

0269-5022

Publication Date

November 2008

Volume

22

Issue

6

Start / End Page

587 / 596

Related Subject Headings

  • Young Adult
  • Ultrasonography, Prenatal
  • Pregnancy Trimester, First
  • Pregnancy Outcome
  • Pregnancy
  • Menstruation
  • Male
  • Infant, Premature
  • Infant, Newborn
  • Humans
 

Citation

APA
Chicago
ICMJE
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Hoffman, C. S., Messer, L. C., Mendola, P., Savitz, D. A., Herring, A. H., & Hartmann, K. E. (2008). Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatric and Perinatal Epidemiology, 22(6), 587–596. https://doi.org/10.1111/j.1365-3016.2008.00965.x
Hoffman, Caroline S., Lynne C. Messer, Pauline Mendola, David A. Savitz, Amy H. Herring, and Katherine E. Hartmann. “Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester.Paediatric and Perinatal Epidemiology 22, no. 6 (November 2008): 587–96. https://doi.org/10.1111/j.1365-3016.2008.00965.x.
Hoffman CS, Messer LC, Mendola P, Savitz DA, Herring AH, Hartmann KE. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatric and perinatal epidemiology. 2008 Nov;22(6):587–96.
Hoffman, Caroline S., et al. “Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester.Paediatric and Perinatal Epidemiology, vol. 22, no. 6, Nov. 2008, pp. 587–96. Epmc, doi:10.1111/j.1365-3016.2008.00965.x.
Hoffman CS, Messer LC, Mendola P, Savitz DA, Herring AH, Hartmann KE. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatric and perinatal epidemiology. 2008 Nov;22(6):587–596.
Journal cover image

Published In

Paediatric and perinatal epidemiology

DOI

EISSN

1365-3016

ISSN

0269-5022

Publication Date

November 2008

Volume

22

Issue

6

Start / End Page

587 / 596

Related Subject Headings

  • Young Adult
  • Ultrasonography, Prenatal
  • Pregnancy Trimester, First
  • Pregnancy Outcome
  • Pregnancy
  • Menstruation
  • Male
  • Infant, Premature
  • Infant, Newborn
  • Humans