Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Pulmonary Vein Isolation Plus Adjunct Techniques Versus Pulmonary Vein Isolation Alone for Persistent Atrial Fibrillation: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Journal of cardiovascular electrophysiology·2026
Same author

Artificial intelligence in genitourinary oncology: publication trends and systematic review.

BJU international·2026
Same author

Alcohol consumption and risk of atrial fibrillation: a pairwise and network meta-analysis.

Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology·2026
Same author

A Culturally Tailored Mobile Health Intervention to Improve Quality of Life in Black Survivors With Prostate Cancer: Protocol for a Stratified Randomized Controlled Trial.

JMIR research protocols·2026
Same author

A Meta-Analytical Review of Executive Function Skills in Adults Who Stutter.

Journal of speech, language, and hearing research : JSLHR·2026
Same author

Practice and Educational Interventions for Nurses to Reduce Restrictive Measures in Pediatric Mental Health: A Scoping Review.

Journal of child and adolescent psychiatric nursing : official publication of the Association of Child and Adolescent Psychiatric Nurses, Inc·2026

Related Experiment Video

Updated: May 10, 2026

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
14:19

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

Published on: June 29, 2013

28.3K

Fetal Weight Extrapolation following a Third-Trimester Ultrasound Examination Using the Gestation-Adjusted Projection

Micah M Vaughn-Valencia1, Yan D Zhao2, Rodney K Edwards3

  • 1Section of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.

American Journal of Perinatology
|June 5, 2025
PubMed
Summary

The gestation-adjusted projection (GAP) method accurately predicts fetal birth weight using third-trimester ultrasound. This systematic review confirms its reliability for diverse populations, aiding delivery planning.

More Related Videos

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

8.4K
High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo
06:43

High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo

Published on: November 8, 2018

10.4K

Related Experiment Videos

Last Updated: May 10, 2026

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
14:19

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

Published on: June 29, 2013

28.3K
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

8.4K
High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo
06:43

High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo

Published on: November 8, 2018

10.4K

Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Diagnostic Accuracy Studies

Background:

  • Accurate estimation of fetal weight is crucial for optimal delivery planning and management of high-risk pregnancies.
  • The gestation-adjusted projection (GAP) method utilizes third-trimester ultrasound data for fetal weight extrapolation.
  • Evaluating the accuracy of the GAP method is essential for its clinical application.

Purpose of the Study:

  • To systematically review and meta-analyze the accuracy of the gestation-adjusted projection (GAP) method in predicting actual birth weight.
  • To assess the reliability of the GAP method in a diverse obstetric population.

Main Methods:

  • A systematic literature search was conducted across major databases (MEDLINE/PubMed, Embase, Scopus, Web of Science) up to June 2023.
  • Included studies assessed the GAP method's accuracy in term pregnancies (≥37 weeks) with ultrasounds between 34-36 weeks gestation.
  • Meta-analysis evaluated agreement using mean percent error, mean absolute error, and mean absolute percent error, with random-effects modeling due to heterogeneity.

Main Results:

  • Eight high-quality studies with 5,306 subjects were included, exhibiting low risk of bias.
  • The GAP method demonstrated a mean percent error of 3.1% (95% CI: 1.1-5.2).
  • Mean absolute error was 240g (95% CI: 205-275g) and mean absolute percent error was 8.0% (95% CI: 6.9-9.1).

Conclusions:

  • The gestation-adjusted projection (GAP) method is an accurate and reliable tool for predicting fetal birth weight.
  • The GAP method is suitable for use in diverse populations, including those with diabetes, obesity, and other risk factors.
  • This validated method supports informed clinical decision-making in obstetric care and delivery planning.