
Reference Manual 62
HC (cm) GA (wd) ±SD (wd) HC (cm) GA (wd) ±SD (wd)
24.00 25w0d 01w4d 34.70 39w0d 04w3d
25.10 26w0d 01w5d 34.90 40w0d 05w0d
26.30 27w0d 01w6d
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)
14 10.60 10.60 10.60 28 27.40 25.40 29.00
15 11.50 10.30 12.90 29 28.40 26.30 30.10
16 12.70 11.40 14.10 30 29.30 27.30 31.00
17 14.00 12.50 15.30 31 30.30 28.20 32.00
18 15.20 13.80 16.60 32 31.10 29.00 32.80
19 16.40 14.90 18.00 33 31.80 29.70 33.50
20 17.60 16.10 19.30 34 32.50 30.30 34.30
21 19.00 17.30 20.60 35 33.20 31.00 34.90
22 20.30 18.50 21.90 36 33.70 31.50 35.50
23 21.50 19.80 23.20 37 34.00 32.10 36.00
24 22.60 21.00 24.40 38 34.40 32.50 36.40
25 24.00 22.30 25.70 39 34.70 32.90 36.90
26 25.10 23.40 26.80 40 34.90 33.30 37.20
27 26.30 24.40 28.00
Head Circumference (HC) : 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 = 8.96 + 0.54 × HC + 0.0003 × HC
3
Output Unit : w(weeks)
Input Unit : cm
Min Range : 5.5 cm
Max Range : 35.7 cm
Standard Deviation:
Min Range(w) Max Range(w) ±2SD(w)
12 18 1.19
18 24 1.48
24 30 2.06
30 36 2.98
36 42 2.70
Fetal Growth 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.
Equation = 1.56 x MA - 0.0002548 x MA
3
- 11.48
Output Unit : cm
Input Unit : w(weeks)
Min Range : 12 w
Max Range : 40 w
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