Campbell S and Thomas A.
Ultrasound measurement of the fetal head to
abdominal
circumference in the assessment of growth
retardation
GA (wks) |
5th Percentile |
Mean |
95th Percentile |
13-14 |
1.14 |
1.23 |
1.31 |
15-16 |
1.05 |
1.22 |
1.39 |
17-18 |
1.07 |
1.18 |
1.29 |
19-20 |
1.09 |
1.18 |
1.39 |
21-22 |
1.06 |
1.15 |
1.25 |
23-24 |
1.05 |
1.13 |
1.21 |
25-26 |
1.04 |
1.13 |
1.22 |
27-28 |
1.05 |
1.13 |
1.21 |
29-30 |
0.99 |
1.1 |
1.21 |
31-32 |
0.96 |
1.07 |
1.17 |
33-34 |
0.96 |
1.04 |
1.11 |
35-36 |
0.93 |
1.02 |
1.11 |
37-38 |
0.92 |
0.98 |
1.05 |
39-40 |
0.87 |
0.97 |
1.06 |
41-42 |
0.93 |
0.96 |
1 |