
Reference Manual 38
CRL (cm) GA (wd) CRL (cm) GA (wd) CRL (cm) GA (wd) CRL (cm) GA (wd)
0.80 6w6d 2.30 8w5d 3.80 10w3d 5.30 12w0d
0.90 7w0d 2.40 8w6d 3.90 10w4d 5.40 12w1d
1.00 7w1d 2.50 9w0d 4.00 10w5d 5.50 12w2d
1.10 7w2d 2.60 9w1d 4.10 10w5d 5.60 12w2d
1.20 7w3d 2.70 9w2d 4.20 10w6d 5.70 12w3d
1.30 7w4d 2.80 9w2d 4.30 11w0d 5.80 12w4d
1.40 7w5d 2.90 9w3d 4.40 11w1d 5.90 12w5d
1.50 7w6d 3.00 9w4d 4.50 11w1d 6.00 12w5d
1.60 8w0d 3.10 9w5d 4.60 11w2d
Femur Length (FL) : KOREAN
GA Table
Y.G Park.“ The Standardization of Fetal body parts according to the normal Korean Gestational
Age in Ultrasound” Korean Ultrasound Institute, Vol. 14, No.2, 1995
GA = FL × 2.36855 + 0.2089 × FL
2
+ 10.513242
Output Unit : w (weeks)
Input Unit : cm
Min Range : 0.7 cm
Max Range : 7.3 cm
Fetal Growth Table
Y.G Park.“ The Standardization of Fetal body parts according to the normal Korean Gestational
Age in Ultrasound” Korean Ultrasound Institute, Vol. 14, No.2, 1995
FL = 4.221513 x MA - 0.035314 x MA
2
- 38.929993 (Unit: mm)
Output Unit : cm
Input Unit : w (week)
Min Range : 12 w
Max Range : 40 w
Age (W) Growth (cm) ±SD (cm) Age (W) Growth (cm) ±SD (cm)
12 0.790 0.142 32 6.100 0.205
16 1.900 0.133 34 6.461 0.226
20 3.000 0.204 36 6.710 0.222
24 4.190 0.198 38 7.013 0.245
28 5.196 0.209 40 7.287 0.216
Femur Length (FL) : HADLOCK
GA Table
Hadlock, F., Deter, R.L., Harrist, R.B., Park, S.K. “Estimating Fetal Age: Computer-Assisted
Analysis of Multiple Fetal Growth Parameters” Radiology, 1984, 152: 497-501. (Biometric Age
and Growth Equations)
GA = 10.35 + 2.460 × FL + 0.170 × FL
2
Output Unit : w (weeks)
Input Unit : cm
Min Range : 0.64 cm
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