Fetal femur length: a critical reevaluation of the relationship to menstrual age.

Abstract:

:This investigation has reexamined the measurement of the femur length and the use of this measurement as a growth and dating parameter. Straight-line measurements of shaft length were found to be smaller than measurements made along the bone curvature. However, the maximum difference did not exceed 2 mm. Thus, because of its simplicity, use of straight-line measurements appears justified. The optimal (R2 = 96.1%) growth curve model was a linear-quadratic function, with variability around the regression line increasing with menstrual age. The optimal (R2 = 96.8%) dating curve model was a linear-quadratic function in which loge menstrual age is a function of femur length. The variability associated with age estimates increased with femur length. These data were used to construct new standard curves for growth assessment and dating of fetuses using femur length measurements.

journal_name

Obstet Gynecol

authors

Warda AH,Deter RL,Rossavik IK,Carpenter RJ,Hadlock FP

subject

Has Abstract

pub_date

1985-07-01 00:00:00

pages

69-75

issue

1

eissn

0029-7844

issn

1873-233X

journal_volume

66

pub_type

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