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Related Experiment Video

Updated: May 27, 2026

A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
07:04

A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse

Published on: October 24, 2017

[How to date pregnancy?].

L J Salomon1

  • 1Maternité, université Paris-Descartes, hôpital Necker-Enfants Malades, AP-HP, 149, rue de Sèvres, 75743 Paris cedex 15, France. laurentsalomon@gmail.com

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|November 8, 2011
PubMed
Summary
This summary is machine-generated.

Accurate gestational dating is crucial for fetal growth assessment and management. Using crown-rump length (CRL) measurements between 11-14 weeks provides precise conception dating, accurate within 5 days for 95% of pregnancies.

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Last Updated: May 27, 2026

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Electromyometrial Imaging of Uterine Contractions in Pregnant Women
08:07

Electromyometrial Imaging of Uterine Contractions in Pregnant Women

Published on: May 26, 2023

Area of Science:

  • Maternal-Fetal Medicine
  • Embryology
  • Prenatal Diagnostics

Context:

  • Accurate gestational age assessment is vital for optimal pregnancy management.
  • Standardized methods for early pregnancy dating are essential.
  • Crown-rump length (CRL) is a key biometric parameter in early ultrasound.

Purpose:

  • To recommend the use of crown-rump length (CRL) for determining gestational age.
  • To establish a reliable method for conception dating in pregnancies.
  • To improve the accuracy of prenatal screening and management.

Summary:

  • Expert opinion supports using crown-rump length (CRL) measurements taken between 11-14 weeks for gestational assessment.
  • This method, excluding assisted reproductive technology (ART) pregnancies, allows for accurate dating.
  • The crown-rump length (CRL) measurement can determine conception date with an accuracy of approximately 5 days in 95% of cases.

Impact:

  • Enhances the accuracy of fetal growth assessment.
  • Improves the precision of aneuploidy screening protocols.
  • Facilitates appropriate and timely management of pregnancy term and delivery.