
Reference Manual 87
Head Circumference (HC) / Abdominal Circumference (AC): Campbell
Fetal Growth Table
Campbell HC/AC Fetal Growth Tabel for Uranus
Campbell, s. “Ultasound Measurement of the Fetal Head to Abdomen Circumference Ratio
in the Assessment of Growth Retardation.” Br J Obstetrics and Gynecology, Vol. 84. 165-174.
March 1977.
Age (W)
HC/AC
(None)
Min
(None)
Max
(None)
Age (W)
HC/AC
(None)
Min
(None)
Max
(None)
13 1.23 1.14 1.31 28 1.13 1.05 1.22
14 1.23 1.14 1.31 29 1.10 0.99 1.21
15 1.22 1.05 1.39 30 1.10 0.99 1.21
16 1.22 1.05 1.39 31 1.07 0.96 1.17
17 1.18 1.07 1.29 32 1.07 0.96 1.17
18 1.18 1.07 1.29 33 1.04 0.96 1.11
19 1.18 1.09 1.26 34 1.04 0.96 1.11
20 1.18 1.09 1.26 35 1.02 0.93 1.11
21 1.15 1.06 1.25 36 1.02 0.93 1.11
22 1.15 1.06 1.25 37 0.98 0.92 1.05
23 1.13 1.05 1.21 38 0.98 0.92 1.05
24 1.13 1.05 1.21 39 0.97 0.87 1.06
25 1.13 1.04 1.22 40 0.97 0.87 1.06
26 1.13 1.04 1.22 41 0.96 0.93 1.00
27 1.13 1.05 1.22 42 0.96 0.93 1.00
Estimated Fetal Weight Formula
Methods using (BPD, AC)
Shepard Method [grams]
[Equation]
1000×10
(-1.7492+0.166× (BPD)+0.046× (AC)-0.002646× (AC) × (BPD))
[Input Range]
AC :15.5~40.0 cm
BPD : 3.1~10.0 cm
EFW : 224~4925 g
[Reference]
Shepard MJ, et al, “ An Evaluation of Two Equations for Predicting Fetal Weight by Ultrasound,”
American Journal of Ob & Gyn, January 1982; 142 (1):47-54
Hadlock Method [grams]
[Equation]
10
(1.1134+ (0.05845×AC)- (0.000604×AC
2
)- (0.007365×BPD
2
)+ (0.000595×BPD×AC)+ (0.1694×BPD))
[Reference]
Hadlock F, et al, “Sonographic Estimated of Fetal Weight,” Radiology 1984:150:535-540
Merz Method [grams]
[Equation]
-3200.4+157.07× AC+15.9×BPD
2
[Reference]
E. Merz, W. Goldhofer, E. Timor-Tritsch “Ultrasound in Gynecology and Obstetrics” Textbook
and Atlas, 1991, Georg Thieme Verlag, 308-338
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