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Related Experiment Videos

Fetal head circumference: relation to menstrual age

F P Hadlock, R L Deter, R B Harrist

    AJR. American Journal of Roentgenology
    |April 1, 1982
    PubMed
    Summary

    This study establishes a nonlinear relationship between fetal head circumference and gestational age using ultrasound data. The findings provide accurate methods for predicting fetal age and detecting growth issues.

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    Re: Diagnostic accuracy of individual antenatal tools for prediction of small-for-gestational age at birth. B. Poljak, U. Agarwal, R. Jackson, Z. Alfirevic and A. Sharp. Ultrasound Obstet Gynecol 2017; 49: 493-499.

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    Re: Prediction of microcephaly at birth using three reference ranges for fetal head circumference: can we improve prenatal diagnosis? Z. Leibovitz, E. Daniel-Spiegel, G. Malinger, K. Haratz, M. Tamarkin, L. Gindes, L. Schreiber, L. Ben-Sira, D. Lev, I. Shapiro, H. Bakry, B. Weizman, A. Zreik, S. Egenburg, A. Arad, R. Tepper, D. Kidron and T. Lerman-Sagie. Ultrasound Obstet Gynecol 2016; 47: 586-592.

    Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology·2016

    Area of Science:

    • Obstetrics and Gynecology
    • Fetal Medicine
    • Medical Imaging

    Background:

    • Accurate assessment of fetal development is crucial in prenatal care.
    • Gestational age estimation and monitoring fetal growth are key components of obstetric management.

    Purpose of the Study:

    • To determine the relationship between fetal head circumference and menstrual age.
    • To develop a mathematical model for predicting gestational age based on head circumference.
    • To evaluate the utility of head circumference in assessing fetal growth.

    Main Methods:

    • Cross-sectional analysis of 400 fetuses (15-41 weeks gestation).
    • Examination using a linear array real-time ultrasound scanner.
    • Mathematical modeling (linear quadratic and linear cubic functions) applied to head circumference data.

    Main Results:

    • A nonlinear growth curve for fetal head circumference was identified, similar to biparietal diameter growth.
    • Both linear quadratic and linear cubic functions (r2 = 98.3%) optimally modeled the data.
    • Predicted head circumference values using the linear cubic function closely matched established postnatal norms (mean difference -0.94 mm).

    Conclusions:

    • Fetal head circumference is a reliable indicator for estimating menstrual age.
    • The developed mathematical models can aid in predicting gestational age.
    • Head circumference measurements are valuable for estimating fetal weight and identifying intrauterine growth retardation.

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