
Reference Manual 60
Age (W)
Growth
(cm)
Min (cm) Max (cm) Age (W)
Growth
(cm)
Min (cm) Max (cm)
23 3.80 3.30 4.20 37 6.20 5.70 6.70
24 4.00 3.50 4.50 38 6.30 5.90 6.80
25 4.20 3.70 4.70 39 6.50 6.00 7.00
26 4.40 3.90 4.90 40 6.60 6.10 7.10
Humerus (HUM) : 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 = HUM x 3.02718 + 0.2005 x HUM
2
+ 9.907522
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
HUM = 3.679948 x MA - 0.029359 x MA
2
- 33.413660 (Unit: mm)
Output Unit : cm
Input Unit : w (week)
Min Range : 12w
Max Range : 40w
Age (W) Growth (cm) ±SD (cm) Age (W) Growth (cm) ±SD (cm)
12 0.690 0.118 32 5.495 0.212
16 1.796 0.122 34 5.800 0.253
20 2.803 0.129 36 6.114 0.249
24 3.802 0.169 38 6.396 0.256
28 4.605 0.178 40 6.579 0.316
Humerus (HUM) : MERZ
GA Table
Merz, Eberband, “Ultrasonic Mensuration of Fetal Limb Bones in the Second and Third
Trimesters.” J Clin Ultrasound 15: 175-183, Table 1, March/April 1987
Humerus (cm) G.A (wd) Humerus (cm) G.A (wd) Humerus (cm) G.A (wd)
1.00 13w0d 3.70 23w0d 5.60 33w0d
1.20 14w0d 3.80 24w0d 5.80 34w0d
1.40 15w0d 4.20 25w0d 5.90 35w0d
1.70 16w0d 4.30 26w0d 6.00 36w0d
2.00 17w0d 4.50 27w0d 6.10 37w0d
2.30 18w0d 4.70 28w0d 6.40 38w0d
2.60 19w0d 4.80 29w0d 6.50 39w0d
2.90 20w0d 5.00 30w0d 6.60 40w0d
3.20 21w0d 5.30 31w0d
3.30 22w0d 5.40 32w0d
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