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Journal of Ultrasound in Medicine, Vol 3, Issue 10 439-442, Copyright © 1984 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

The femur length/head circumference relation in obstetric sonography

F. P. Hadlock, R. B. Harrist, Y. Shah and S. K. Park

The relationship of sonographic femur length to biparietal diameter (BPD) in utero may be useful in detecting short-limb dwarfism, hydrocephaly, microcephaly, and measurement errors. Because BPD can be adversely affected by head shape changes (e.g., dolichocephaly), falsely high or low values of femur length/BPD could result. Because head circumference is less affected by head shape changes than is BPD, it should be a better standard of head size against which to judge limb length. The authors report normal values for the relationship between femur length and head circumference, based on a cross-sectional analysis of 361 normal fetuses (15-42 weeks) using real-time ultrasound.




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Copyright © 1984 by the American Institute of Ultrasound in Medicine.