
Reference Manual 56
Occipital Frontal Diameter (OFD) : ASUM (SCW)
Fetal Growth Table
Australasian Society for Ultrasound in Medicine
Policies and Statements - [D7] Statement On Normal Ultrasonic Fetal Measurements (Revised
May 2001)
Age (W) Growth (mm) ±SD (mm) Age (W) Growth (mm) ±SD (mm)
11 21.00 2.00 27 86.00 4.50
12 24.00 2.00 28 95.00 5.00
13 29.00 3.00 29 97.00 5.50
14 34.00 3.00 30 98.00 5.50
15 38.00 3.00 31 101.00 5.00
16 46.00 3.00 32 102.00 5.00
17 50.00 3.00 33 107.00 5.50
18 54.00 3.50 34 108.00 5.50
19 57.00 3.50 35 109.00 5.50
20 61.00 3.50 36 112.00 5.50
21 63.00 4.00 37 113.00 6.00
22 68.00 3.50 38 116.00 5.50
23 76.00 4.00 39 119.00 6.00
24 79.00 4.00 40 120.00 6.00
25 82.00 4.50 41 122.00 6.00
26 84.00 4.50
Occipital Frontal Diameter (OFD) : 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 = OFD ×1.55941 + 0.07730580 × OFD
2
+ 7.937391
Output Unit : w (weeks)
Input Unit : cm
Min Range : 2.4 cm
Max Range : 12.4 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
OFD = 5.956658 x MA - 0.045874 x MA
2
- 40.707331 (Unit: mm)
Output Unit : cm
Input Unit : w (week)
Min Range : 12w
Max Range : 40w
Age (W) Growth (cm) ±SD (wd) Age (W) Growth (cm) ±SD (wd)
12 2.503 0.391 32 10.283 0.357
16 4.250 0.269 34 10.716 0.390
20 5.918 0.303 36 11.553 0.365
24 7.479 0.564 38 12.053 0.233
28 9.173 0.393 40 12.059 0.598
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