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Published on: September 12, 2025
[Application of a technique to establish criteria for uterine length measurement]
Sandra Acevedo Gallegos1, Mario Estanislao Guzmán Huerta, Berenice Velázquez Torres
1Instituto Nacional de Perinatología. draacevedo_sandra@yahoo.com.mx
Background:
The uterine length measurement is a routine practice in the prenatal care of pregnant women. It has been attributed a sensibility of 86% to detect fetal grown restriction. The technique is easy to perform and reproducible between observers, although we have found variation between intra- and inter-observers measurements.
Objective:
To evaluate the useful of a maneuver to improve the reliability of the uterine length measurement in a group of obstetrics residents.
Material And Methods:
The measurement was performed on pregnant women. The results were analyzed by intraclass correlation coefficient to evaluate the concordance between observers based in a variance analysis model (ANOVA) of repeated measurements.
Results:
There were not differences between groups about demographic variables. All residents improve the reliability in their measurements. The intra-class correlation coefficient was 0.77 (confidence interval 0.63-0.88) before the maneuver, and after this one the intra-class correlation coefficient improved to 0.96 (confidence interval 0.92-0.98).
Conclusion:
The uterine measurement following detailed indications improve the interobserver concordance. We think it is advisable to evaluate the use of this maneuver in a routine way in our institute and in other places that bring prenatal care.
