Page 100 - PCC05
P. 100
When a pregnancy is visualized: measurements
Measurements for dating of pregnancy
Gestational sac: mean sac diameter (MSD): 3 measurements
Results interobserver variability first trimester measurements
CRL1 observer 1 (mm)
95% PI for CRL1 observer 2 (mm)
5
[4.5‐5.6]
6
[5.4‐6.7]
7
[6.3‐7.9]
MSD
observer 1 (mm)
95% PI for MSD observer 2 (mm)
19
[16.0‐23.4]
20
[16.8‐24.5]
21
[17.6‐25.7]
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