Intra- and inter-observer variability of uterine measurements with three-dimensional ultrasound and implications for clinical practice  Sotirios H. Saravelos, Tin-Chiu Li  Reproductive BioMedicine Online  Volume 31, Issue 4, Pages 557-564 (October 2015) DOI: 10.1016/j.rbmo.2015.06.024 Copyright © 2015 Reproductive Healthcare Ltd. Terms and Conditions

Figure 1 Example of three different uteri: (a) a clear delineation can be seen of both lateral uterine walls; (b) the borders of the right lateral wall are less clear because of the rotation of the endometrial cavity; and (c) the borders of the left lateral wall are less clear because of the presence of the ovary. Reproductive BioMedicine Online 2015 31, 557-564DOI: (10.1016/j.rbmo.2015.06.024) Copyright © 2015 Reproductive Healthcare Ltd. Terms and Conditions

Figure 2 Relationship between the mean of three measurements for percentage of cavity indentation (cavity indentation/fundal wall thickness) and the difference between the highest and lowest measurements for observer 1 and 2. Here, it is shown that increase in cavity indentation does not cause an increase in the difference of measurements. Reproductive BioMedicine Online 2015 31, 557-564DOI: (10.1016/j.rbmo.2015.06.024) Copyright © 2015 Reproductive Healthcare Ltd. Terms and Conditions

Figure 3 Bland–Altman plots of inter-observer variability whereby the difference of the measurements between observer 1 and observer 2 is plotted against the mean of the measurements of observer 1 and observer 2. The mean difference of the measurements along with the limits of agreement (lower limit: mean difference −2SD; upper limit: mean difference +2SD) are depicted in each graph. Reproductive BioMedicine Online 2015 31, 557-564DOI: (10.1016/j.rbmo.2015.06.024) Copyright © 2015 Reproductive Healthcare Ltd. Terms and Conditions

Figure 3 Bland–Altman plots of inter-observer variability whereby the difference of the measurements between observer 1 and observer 2 is plotted against the mean of the measurements of observer 1 and observer 2. The mean difference of the measurements along with the limits of agreement (lower limit: mean difference −2SD; upper limit: mean difference +2SD) are depicted in each graph. Reproductive BioMedicine Online 2015 31, 557-564DOI: (10.1016/j.rbmo.2015.06.024) Copyright © 2015 Reproductive Healthcare Ltd. Terms and Conditions