User guide
Chapter 5:  Measurement References 85
References
Obstetrics and Gynecology
. Springer-Verlag, 
New York, (1986), 186, Table 7.20.)
Femur Length (FL)
Chitty, Lyn S. et al. “Charts of Fetal Size: 4. Femur 
Length.” 
British Journal of Obstetrics and 
Gynaecology
 101: (February 1994), 135.
Hadlock, F., et al. “Estimating Fetal Age: 
Computer-Assisted Analysis of Multiple Fetal 
Growth Parameters.” 
Radiology
, 152: (1984), 
497-501.
Jeanty P, E. Cousaert, and F. Cantraine. “A 
Longitudinal Study of Fetal Limb Growth.” 
American Journal of Perinatology
, 1: (January 
1984), 136-144, Table 5.
(Also published in Hansmann, Hackeloer, 
Staudach, Wittman. 
Ultrasound Diagnosis in 
Obstetrics and Gynecology
. Springer-Verlag, 
New York, (1986), 182, Table 7.17.)
Head Circumference (HC)
Chitty, Lyn S., et al. “Charts of Fetal Size: 2. Head 
Measurements.” 
British Journal of Obstetrics and 
Gynaecology
 101: (January 1994), 43, Appendix: 
HC-Derived.
Hadlock, F., et al. “Estimating Fetal Age: 
Computer-Assisted Analysis of Multiple Fetal 
Growth Parameters.” 
Radiology
, 152: (1984), 
497-501.
Jeanty P, E. Cousaert, and F. Cantraine. “A 
longitudinal study of Fetal Head Biometry.” 
American J of Perinatology
, 1: (January 1984), 
118-128, Table 3.
(Also published in Hansmann, Hackeloer, 
Staudach, Wittman. 
Ultrasound Diagnosis in 
Obstetrics and Gynecology
. Springer-Verlag, 
New York, (1986), 176, Table 7.8.)
Head Circumference (HC)/Abdominal 
Circumference (AC)
Campbell S., Thoms Alison. “Ultrasound 
Measurements of the Fetal Head to Abdomen 
Circumference Ratio in the Assessment of Growth 
Retardation,” 
British Journal of Obstetrics and 
Gynaecology
, 84: (March 1977), 165-174.
Ratio calculations
FL/AC Ratio
Hadlock F.P., R. L. Deter, R. B. Harrist, E. Roecker, 
and S.K. Park. “A Date Independent Predictor of 
Intrauterine Growth Retardation: Femur 
Length/Abdominal Circumference Ratio,” 
American Journal of Roentgenology
, 141: 
(November 1983), 979-984.
FL/BPD Ratio
Hohler, C.W., and T.A. Quetel. “Comparison of 
Ultrasound Femur Length and Biparietal Diameter 
in Late Pregnancy,” 
American Journal of Obstetrics 
and Gynecology
, 141:7 (Dec. 1 1981), 759-762.
FL/HC Ratio
Hadlock F.P., R. B. Harrist, Y. Shah, and S. K. Park. 
“The Femur Length/Head Circumference Relation 
in Obstetric Sonography.” 
Journal of Ultrasound in 
Medicine
, 3: (October 1984), 439-442.
HC/AC Ratio
Campbell S., Thoms Alison. “Ultrasound 
Measurements of the Fetal Head to Abdomen 
Circumference Ratio in the Assessment of Growth 
Retardation,” 
British Journal of Obstetrics and 
Gynaecology
, 84: (March 1977), 165-174.
General references
+/x or S/D Ratio
+/x = abs (Velocity A/Velocity B)
where A = velocity cursor +
B = velocity cursor x










