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Related Experiment Video

Updated: Jul 14, 2026

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

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

Published on: October 24, 2017

The 20-week scan: beyond biometry and anatomy.

Ray O Bahado-Singh¹, Marilyn Raymond

¹Department of Obstetrics and Gynecology, Wayne State University, Detroit, Michigan, USA. rbahados@med.wayne.edu

Clinical Obstetrics and Gynecology

|May 22, 2007

Summary

The 20-week ultrasound, or anomaly scan, now offers expanded capabilities beyond detecting fetal defects. Advances in sonographic resolution and techniques like uterine artery Doppler velocimetry enhance its clinical value.

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Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer

Published on: January 7, 2014

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Last Updated: Jul 14, 2026

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

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Published on: October 24, 2017

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer

Published on: January 7, 2014

Area of Science:

Medical imaging
Obstetrics and Gynecology
Fetal medicine

Background:

The traditional 20-week scan primarily focused on gestational age, detecting congenital anomalies, and assessing placental/amniotic fluid status.
Significant advancements in ultrasound technology have occurred since the inception of routine anomaly scans.
Improved sonographic resolution and evolving clinical applications are redefining the scope of mid-trimester fetal assessments.

Purpose of the Study:

To highlight the expanded role and evolving definition of the 20-week fetal ultrasound.
To discuss the impact of technological progress on diagnostic accuracy.
To explore emerging ultrasound applications and their clinical significance.

Main Methods:

Review of advancements in sonographic resolution and imaging techniques.
Discussion of the integration of new ultrasound applications into routine obstetric care.
Emphasis on the importance of personnel training for improved diagnostic outcomes.

Main Results:

Enhanced sonographic resolution leads to improved diagnostic accuracy for detecting fetal anomalies.
New applications, including uterine artery Doppler velocimetry and cervical length assessment, are emerging as clinically significant.
These newer techniques may offer comparable or greater clinical benefits than traditional anomaly detection.

Conclusions:

The 20-week scan's objectives have broadened considerably due to technological progress.
Uterine artery Doppler and cervical status evaluation represent significant advancements in prenatal assessment.
The future of mid-trimester ultrasound lies in integrating these advanced techniques for comprehensive fetal and maternal evaluation.