
Reference Manual 42
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)
Age
(W)
Growth
(cm)
Min
(cm)
Max
(cm)
Age
(W)
Growth
(cm)
Min
(cm)
Max
(cm)
14 1.20 0.60 1.90 28 4.50 3.80 5.30
15 1.50 0.90 2.10 29 4.70 4.10 5.40
16 1.80 1.30 2.30 30 4.90 4.30 5.60
17 2.10 1.30 2.80 31 5.10 4.20 5.90
18 2.30 1.50 3.10 32 5.20 4.20 6.30
19 2.60 1.90 3.30 33 5.40 4.60 6.20
20 2.80 2.10 3.60 34 5.50 4.60 6.50
21 3.10 2.40 3.70 35 5.70 5.10 6.20
Age
(W)
Growth
(cm)
Min
(cm)
Max
(cm)
Age
(W)
Growth
(cm)
Min
(cm)
Max
(cm)
22 3.30 2.70 3.90 36 5.80 5.40 6.30
23 3.50 2.80 4.20 37 5.90 5.40 6.50
24 3.70 2.90 4.50 38 6.10 5.60 6.50
25 4.00 3.40 4.50 39 6.20 5.60 6.70
26 4.20 3.60 4.70 40 6.30 5.90 6.70
27 4.40 3.70 5.00
Femur Length (FL) : SHINOZUKA
GA Table
Norio Shinozuka, Takashi Okai, et al. “Standard Values of Ultrasonographic Fetal Biometry”
Japanese Journal of Medical Ultrasonics, Vol.23, No.12, 1996, pp877-888
FL (cm) GA (wd) Min (wd) Max (wd) FL (cm) GA (wd) Min (wd) Max (wd)
2.00 16w1d 15w2d 17w0d 4.60 26w2d 24w6d 27w5d
2.10 16w3d 15w4d 17w2d 4.70 26w5d 25w2d 28w1d
2.20 16w6d 16w0d 17w5d 4.80 27w2d 25w6d 28w5d
2.30 17w1d 16w1d 18w1d 4.90 27w5d 26w2d 29w1d
2.40 17w3d 16w3d 18w3d 5.00 28w2d 26w6d 29w5d
2.50 17w6d 16w6d 18w6d 5.10 28w5d 27w2d 30w1d
2.60 18w1d 17w1d 19w1d 5.20 29w2d 27w5d 30w6d
2.70 18w3d 17w3d 19w3d 5.30 29w5d 28w1d 31w2d
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