
Reference Manual 28
Age (W)
Growth (cm)
Min (cm) Max (cm) Age (W)
Growth (cm)
Min (cm) Max (cm)
17 3.81 3.49 4.14 33 8.21 7.75 8.68
18 4.16 3.82 4.50 34 8.41 7.94 8.88
19 4.50 4.15 4.85 35 8.59 8.11 9.06
20 4.82 4.46 5.19 36 8.76 8.29 9.24
21 5.14 4.77 5.52 37 8.92 8.45 9.40
22 5.45 5.06 5.84 38 9.07 8.60 9.54
23 5.75 5.35 6.15 39 9.21 8.74 9.69
24 6.04 5.63 6.46 40 9.35 8.88 9.81
25 6.33 5.90 6.75 41 9.40 8.90 9.90
26 6.59 6.16 7.02
Crown-Rump Length (CRL) : 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 = CRL × 1.08815 + 6.321988
Output Unit : w(weeks)
Input Unit : cm
Min Range : 0.9 cm
Max Range : 5.4 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
Output Unit : cm
Input Unit : w(week)
Min Range : 7w
Max Range : 11w
Age (W)
Growth (cm)
±SD (cm) Age (W)
Growth (cm)
Min (cm)
7 1.045 0.287 10 3.307 0.297
8 1.589 0.304 11 4.286 0.346
9 2.339 0.291
Crown-Rump Length (CRL) : ROBINSON
GA Table
Robinson HP, Fleming JEE British Journal of Obstetrics and Gynecology 82:702-710, September 1975
GAdays = 8.052 ×
+ 23.73
Output Unit : d(days)
Input Unit : mm
Min Range : 0.70 cm
Max Range : 7.96 cm
Crown-Rump Length (CRL) : HANSMANN
GA Table
Hansmann, Hackeloer, Staudach, Wittman. “Ultrasound Diagnosis in Obsterics and
Gynecology.” Springer-Verlag, New York, 1986, p.439.
Conversion: This table is converted from German age to American age notation by the
following equation.
America age days = ( German weeks – 1 ) x 7 + ( German days – 1)
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