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Fetal thigh circumference: A critical evaluation of its relationship to menstrual age
Author(s) -
Deter Russell L.,
Warda Ahmed,
Rossavik Ivar K.,
Duncan Greg,
Hadlock Frank P.
Publication year - 1986
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870140205
Subject(s) - medicine , circumference , obstetrics , pregnancy , ultrasound , fetus , thigh , gynecology , surgery , radiology , genetics , geometry , mathematics , biology
To provide standards for evaluating fetal thigh circumference measurements obtained with ultrasound, a study of the growth of this parameter during pregnancy was made. Because of possible sampling problems before 22 weeks (menstrual age), this investigation was limited to the 22–40 week time period. Regression analysis indicated that the optimal model ( R 2 = 88.9%) for describing thigh circumference (ThC) growth was a power function. ThC variability increased with menstrual age, from 1.3 cm at 22 weeks to 3.1 cm at 40 weeks. These data were used to construct a standard growth curve for the ThC.