Biomechanical assessment of upright birthing positions using marker-based and markerless motion capture systems.

In the coronal plane, the markerless system matched the marker-based system in the “upright” (R 2 0.799, p < 0.001), “palms” (R 2 0.454, p < 0.008), “elbows, extended knees” (R 2 0.639, p < 0.001), “elbows, bent knees” (R 2 0.714, p < 0.001), “squat” (R 2 0.653, p < 0.015), and “B-Ball” (R 2 0.630, p < 0.001) positions, with a trend towards significance in “all-4s” (R 2 0.270, p < 0.057).

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