International Scholarly Research Notices / 2012 / Article / Tab 4

Research Article

Ultrasound Reference Chart Based on IVF Dates to Estimate Gestational Age at 6–9 weeks’ Gestation

Table 4

The Monash Chart. CRL reference table based on true gestational age in an IVF cohort.

CRL (mm)GA (wks, days)GA (days)

1.0 mm6W1D42.9
1.5 mm6W1D43.3
2.0 mm6W2D43.7
2.5 mm6W2D44.1
3.0 mm6W3D44.5
3.5 mm6W3D45.0
4.0 mm6W3D45.4
4.5 mm6W4D45.8
5.0 mm6W4D46.2
5.5 mm6W5D46.6
6.0 mm6W5D47.0
6.5 mm6W5D47.4
7.0 mm6W6D47.8
7.5 mm6W6D48.2
8.0 mm7W0D48.6
8.5 mm7W0D49.1
9.0 mm7W0D49.5
9.5 mm7W1D49.9
10.0 mm7W1D50.3
10.5 mm7W2D50.7
11.0 mm7W2D51.1
11.5 mm7W3D51.5
12.0 mm7W3D51.9
12.5 mm7W3D52.3
13.0 mm7W4D52.7
13.5 mm7W4D53.2
14.0 mm7W5D53.6
14.5 mm7W5D54.0
15.0 mm7W5D54.4
15.5 mm7W6D54.8
16.0 mm7W6D55.2
16.5 mm8W0D55.6
17.0 mm8W0D56.0
17.5 mm8W0D56.4
18.0 mm8W1D56.8
18.5 mm8W1D57.3
19.0 mm8W2D57.7
19.5 mm8W2D58.1
20.0 mm8W2D58.5
20.5 mm8W3D58.9
21.0 mm8W3D59.3
21.5 mm8W4D59.7
22.0 mm8W4D60.1
22.5 mm8W5D60.5
23.0 mm8W5D60.9
23.5 mm8W5D61.4
24.0 mm8W6D61.8
24.5 mm8W6D62.2
25.0 mm9W0D62.6
25.5 mm9W0D63.0
26.0 mm9W0D63.4

GA: gestational age, W: weeks, and D: days.

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