GE Medical Systems LOGIQ 7 Reference Manual page 162

OB Tables
Table 3-24: FL:Altmann D.G.;Chitty L.S. "New charts for ultrasound dating of
pregnancy" Ultrasound in Obstetrics and Gynecology Vol. 10:174-191. 1997
FL 5%
1.00 12w1d
1.10 12w3d
1.20 12w5d
1.30 13w0d
1.40 13w1d
1.50 13w3d
13w5d
1.60
1.70 14w0d
1.80 14w2d
1.90 14w4d
2.00 14w6d
2.10 15w1d
2.20 15w3d
2.30 15w5d
2.40 16w0d
2.50 16w2d
2.60 16w4d
2.70 16w6d
2.80 17w1d
2.90 17w4d
3.00 17w6d
3.10 18w1d
3.20 18w3d
3.30 18w5d
3.40 19w1d
3.50 19w3d
3.60 19w5d
3.70 20w1d
3.80 20w3d
3 12
-
Unit: FL(cm); GA(weeks+days)
GA
50% 95%
13w0d 13w6d
13w2d 14w1d
13w4d 14w4d
13w6d 14w6d
14w1d 15w1d
14w3d 15w3d
14w5d 15w6d
15w0d 16w1d
15w2d 16w3d
15w4d 16w6d
15w5d 17w1d
16w0d 17w3d
16w2d 17w6d
16w4d 18w1d
16w6d 18w4d
17w2d 18w6d
17w4d 19w2d
17w6d 19w5d
18w2d 20w0d
18w4d 20w3d
18w6d 20w5d
19w2d 21w1d
19w4d 21w4d
19w6d 22w0d
20w0d 22w2d
20w2d 22w5d
20w5d 23w1d
21w0d 23w4d
21w3d 24w0d
LOGIQ 7/LOGIQ 7 Pro Advanced Reference Manual
FL 5%
3.90 20w5d
4.00 21w1d
4.10
21w3d
4.20 21w6d
4.30 22w1d
4.40 22w4d
4.50
22w6d
4.60 23w2d
4.70 23w4d
4.80 24w0d
4.90 24w3d
5.00 24w5d
5.10 25w1d
5.20 25w4d
5.30 26w0d
5.40 26w2d
5.50 26w5d
5.60
27w1d
5.70 27w4d
5.80 28w0d
5.90 28w3d
6.00
28w6d
6.10 29w2d
6.20 29w5d
6.30 30w1d
6.40 30w4d
6.50 31w0d
6.60 31w3d
6.70 32w0d
Direction 5116269-100 Rev. 2
GA
50% 95%
22w4d 24w3d
22w6d 24w6d
25w2d
23w2d
23w5d 25w5d
24w1d 26w1d
24w3d 26w4d
24w6d 27w1d
25w2d 27w4d
25w5d 28w0d
26w1d 28w3d
26w4d 29w0d
27w0d 29w3d
27w3d 30w0d
27w6d 30w3d
28w2d 31w0d
28w5d 31w3d
29w2d 32w0d
29w5d 32w3d
30w1d 33w0d
30w4d 33w4d
31w1d 34w1d
34w4d
31w4d
32w1d 35w1d
32w4d 35w5d
33w1d 36w2d
33w4d 36w6d
34w1d 37w3d
34w4d 38w0d
35w1d 38w5d