Movie 1.

Visualization of transverse folds from multiple angles. Movie displays 2D optical slices and 3D surface view of the lumen in a GD3 1200 h wild type uterus. Optical slices display Hoechst (gray), CDH1 (red) and FOXA2 (green). In 3D surface view, gray surfaces indicate lumen and red surfaces indicate embryos within lumen.