Correlation Study between Fetal Foot Length Measured by Ultrasound and Gestational Age

© 2025 by the Authors. Licensee Whioce Publishing, Singapore. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )

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Abstract

Objective: To explore the correlation between fetal foot length measured by ultrasound and gestational age. Methods: This study employed ultrasound to measure the fetal foot length, femoral length, and foot length/femoral length ratio in 214 pregnant women from 12 to 40 weeks of gestation, all of whom had no pregnancy complications or obstetric complications, and whose fetuses were normal. Results: A significant positive correlation was found between fetal foot length and gestational age (r = 0.967, p < 0.001); a similarly significant positive correlation was observed between fetal femoral length and gestational age (r = 0.972, p < 0.001); and a non-significant positive correlation was noted between the foot length/femoral length ratio and gestational age (r = 0.943, p < 0.001). Conclusion: Ultrasound can accurately measure fetal foot length and femoral length, both of which exhibit a significant positive correlation with gestational age, making them important reference indicators for assessing fetal growth and development.

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