FujiFilm SonoSite X-Porte User Manual page 201

Average Ultrasound Age (AUA)
The system provides an AUA derived from the component measurements from the measurement tables.
Estimated Date of Delivery (EDD) by Average Ultrasound Age (AUA)
Results are displayed as month/day/year.
EDD = system date + (280 days – AUA in days)
Estimated Date of Delivery (EDD) by Last Menstrual Period (LMP)
The date entered into the patient information for LMP must precede the current date.
Results are displayed as month/day/year.
EDD = LMP date + 280 days
Estimated Fetal Weight (EFW)
Hadlock, F. et al. "Estimation of Fetal Weight with the Use of Head, Body, and Femur Measurements, A
Prospective Study." American Journal of Obstetrics and Gynecology, 151:3 (February 1, 1985),
p.333-337.
Hansmann, M. et al. Ultrasound Diagnosis in Obstetrics and Gynecology. New York: Springer-Verlag,
(1986), p.154.
Osaka University. Ultrasound in Obstetrics and Gynecology. (July 20, 1990), p.103-105.
Shepard M.J., V. A. Richards, R. L. Berkowitz, et al. "An Evaluation of Two Equations for Predicting Fetal
Weight by Ultrasound." American Journal of Obstetrics and Gynecology, 142:1 (January 1, 1982),
p.47-54.
University of Tokyo, Shinozuka, N. FJSUM, et al. "Standard Values of Ultrasonographic Fetal Biometry."
Japanese Journal of Medical Ultrasonics, 23:12 (1996), p. 880, Equation 1.
Gestational Age (GA) by Last Menstrual Period (LMP)
The gestational age derived from the LMP date entered on the patient form.
Results are displayed in weeks and days, and is calculated as follows:
GA(LMP) = System date – LMP date
Gestational Age (GA) by Last Menstrual Period (LMPd) Derived from Established Due Date (EDD)
Same as GA by EDD.
The gestational age derived from the system derived LMP using the Established Due Date entered on the
patient form.
Results are displayed in weeks and days, and is calculated as follows:
GA(LMPd) = System Date – LMPd
Measurement references 6-15