DOI: http://dx.doi.org/10.18203/2320-1770.ijrcog20212972

Fetal foot length for assessment of gestational age: a cross sectional study

Vaibhav Sharma, Ruchi Saxena, Priyanka Gaur

Abstract


Background: Fetal age actually begins at conception and an equivalent term is conceptional age. Uncertain gestational age (GA) has been associated with adverse pregnancy outcomes independent of maternal characteristics. The objective was to evaluate the accuracy of fetal foot length (FFL) in estimation of gestational age.

Methods: It was a cross sectional study. Trans abdominal ultrasound on 150 pregnant women with normal singleton pregnancies between 16 to 40 weeks was done to measure FFL. The relationship between GA and FFL was analysed by simple linear regression.

Results: A linear relationship was demonstrated between FFL and GA. (GA (in weeks)=7.490+0.393×FFL (in mm)) with significant correlation (r=0.985, p<0.001).

Conclusions: Ultrasonographic measurement of FFL is a reliable indicator of gestational age and can be a useful alternative to estimate GA when other routine biometric parameters are not conclusive.


Keywords


Fetal foot length, Gestational age, Ultrasound

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References


Kalish RB, Chervenak F. Sonographic determination of gestational age. TMJ. 2009;59(2):202-8.

MacGregor SN, Sabbagha RE. Assessment of gestational age by ultrasound. Glob Libr Women Med. 2008:1756-2228.

Streeter G. Weight, sitting height, head size, foot length and menstrual age of human embryo. Contrib Embryol. 1920;11:143-70.

Hebbar S, Kopal S, Adiga P, Rai L. Fetal foot length throughout gestation: a nomogram. Sri Lanka J Obstet Gynecol. 2013;35(2):58-61.

Ainani R, Mital P, Chaudhary K, Kharbas U, Sonkhya P, Sethi S, et al. A cross sectional study to evaluate foetal foot and femur length and femur/foot length ratio for estimation of gestational age at a tertiary care center. East African Scho J Med Sci. 2019;2(3):153-63.

Malik BA, Ibrahim M, Ali Q, Yousef M, Alshammari QT, Jastaniah S. Use of foot measurements as sonographic parameters for estimation of fetal age. Open J Med Imaging. 2017;7(4):248-62.

Goldstein I, Reece A, Hobbins JC. Sonographic appearance of the feet heel ossification centers and foot length measurements provide independent markers for gestational age estimation. Am J Obstet Gynecol. 1988;159(4):923-6.

Mukhia R, Mukherjee A, Sabnis A. Determination of gestational age of human foetuses from crown heel length, crown rump lengh, foot length and abdominal circumference. Int J Rec Sci Res. 2016;7(1):8164-6.

Yuksel K, Gunyeli I, Doganay M, Ugur M, Mollamahmutoglu L. Ultrasonographic assessment of the fetal foot length for gestational age estimation. Gynecology Obstetric Reprod Med. 2006;12(1):27-9.

Joshi KS, Marahatta SB, Karki S, Tamrakar S, Shrestha NC. Fetal foot length and femur/foot length raio: a significance in Nepalese context. Nepalese J Radiol. 2011;1(1):15-22.

Gameraddin G, Suliman S, Yousef Y. Evaluation of gestational age with fetal foot length using ultrasonography. J Am Sci. 2014;10:5-7.

Pandey VD, Singh V, Nigam GL, Usmani Y, Yadav Y. Fetal foot length for assessment of gestational age: A comprehensive study in North India. Sch J App Med Sci. 2015;3(1):139-44.

Meirowitz NB, Ananth CV, Smulian JC, McLean DA, Guzman ER, Vintzileos AM. Foot length in fetuses with abnormal growth. J Ultrasound Med. 2000;19(3):201-5.