
Reference Manual 54
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
Fetal Growth 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
Age (W)
Growth (cm)
Min (cm)
Max (wd)
Age (W)
Growth (cm)
Min (cm)
Max (wd)
12 0.80 0.40 1.10 27 4.60 4.20 5.00
13 1.10 0.70 1.40 28 4.80 4.40 5.20
14 1.40 1.00 1.70 29 5.00 4.60 5.40
15 1.60 1.30 2.00 30 5.20 4.80 5.60
16 1.90 1.60 2.30 31 5.40 4.90 5.80
17 2.20 1.80 2.60 32 5.50 5.10 6.00
18 2.50 2.10 2.80 33 5.70 5.30 6.20
19 2.70 2.40 3.10 34 5.90 5.40 6.30
20 3.00 2.60 3.40 35 6.00 5.50 6.50
21 3.20 2.90 3.60 36 6.10 5.70 6.60
22 3.50 3.10 3.90 37 6.30 5.80 6.70
23 3.70 3.30 4.10 38 6.40 5.90 6.90
24 4.00 3.60 4.40 39 6.50 6.00 7.00
25 4.20 3.80 4.60 40 6.60 6.20 7.10
26 4.40 4.00 4.80
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