135 Figure 5.6B shows the direction of UP propagation among the selected four phases of the menstrual cycle. During Menses, UP propagation is mostly in the F2C direction. In the LF phase, dominant C2F or F2C propagation can be observed, and a similar behaviour also appears in the EL phase. Finally, in the LL phase, no F2C propagation but mostly “standing”/opposing propagation can be observed. Considering the coordination feature, a trend toward higher CC [0.29 (−0.10 to 0.38)] was found in the Menses phase, and a trend toward lower MSE [0.17 (0.14–0.28)] and Hd [1.65 (1.48–2.10)] was both found in the LF phase [see Figure 5.6C]. In total, ten pairs of TVUS recordings (one during Menses, three during LF, one during EL, and five during LL) were available that passed the quantitative quality check. ICC and its 95% confidence interval of the extracted features are reported in Tables 5.1 and 5.2. Table 5.1. Intra-observer Reproducibility Test: UP Velocity and Coordination Features Were Extracted From Two Subsequent TVUS Recordings Acquired From Ten Healthy Volunteers. ICC and Its 95% Confidence Interval of the Extracted Features Are Reported Feature Name ICC 95% Confidence Interval Lower Bound Upper Bound Velocity C2F 0.918 0.689 0.979 Velocity F2C 0.961 0.798 0.991 Coordination by CC 0.950 0.771 0.988 Coordination by MSE 0.914 0.673 0.978 Coordination by Hd 0.899 0.602 0.975
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