
Reference Manual 37
FL (cm) GA (wd) ±SD (wd) FL (cm) GA (wd) ±SD (wd)
4.40 25w0d 2w0d 7.40 39w0d 3w2d
4.70 26w0d 2w1d 7.50 40w0d 3w2d
Fetal Growth Table
Hansmann, Hackeloer, Staudach, Wittman “Ultrasound Diagnosis in Obstetrics and
Gynecology” Springer- Verlag, New York, 1986, p.176.
Age (W)
Growth (cm)
Min (cm) Max (cm) Age (W)
Growth (cm)
Min (cm) Max (cm)
13 1.00 1.00 1.00 27 4.90 4.40 5.50
14 1.20 1.20 1.20 28 5.10 4.60 5.70
15 1.60 1.30 2.10 29 5.40 4.90 5.90
16 1.80 1.50 2.30 30 5.60 5.10 6.20
17 2.20 1.80 2.60 31 5.90 5.30 6.40
18 2.50 2.10 2.90 32 6.10 5.50 6.60
19 2.80 2.40 3.20 33 6.30 5.70 6.80
20 3.10 2.70 3.50 34 6.50 5.90 7.00
21 3.40 2.90 3.80 35 6.70 6.10 7.20
22 3.60 3.20 4.10 36 6.90 6.30 7.40
23 3.90 3.40 4.40 37 7.10 6.50 7.70
24 4.10 3.70 4.70 38 7.30 6.70 7.90
25 4.40 3.90 4.90 39 7.40 6.80 8.10
26 4.70 4.20 5.20 40 7.50 7.00 8.40
Femur Length (FL) : HOHLER
GA Table
Hohler, C.W., Quetel, T.A. “Fetal Femur Length: Equations for Computer Calculation of
Gestational Age from Ultrasound Measurements.” American Journal of Obsterics and
Gynecology, Vol. 143, No. 4: 479-481, June 15, 1982
GA = 9.18 + 2.67 × FL + 0.16 × FL
2
Output Unit : w(weeks)
Input Unit : cm
Min Range : 1.0 cm
Max Range : 8.0 cm
Femur Length (FL) : JEANTY
GA Table
Jeanty, P., Rodesch, F., Delbeke, D., Dumont, J. “Estimation of Gestational Age from
Measurements of Fetal Long Bones” Journal of Ultrasound Medicine, 3: 75-79, February, 1984
GA = 9.5411757 + 2.977451 × FL + 0.10388013 × FL
2
Output Unit : w(weeks)
Input Unit : cm
Min Range : 1.0 cm
Max Range : 8.0 cm
Standard Deviation : 1.4 weeks
Fetal Growth Table
Jeanty, P. and Romero, R. (1983) Normal values for the leg. In Romero, R., Pilu, G., Jeanty, P.,
Chidini, A. and Hobbins, J.C. (eds.) Prenatal Diagnosis of congenital Anomalies, Table 10-4,
p.324, (Norwalk: Appleton & Lange)
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