To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 7 Sperm swimming across the gap between adjacent mucosa folds. In vivo three-dimensional tracking of sperm behaviors in the mouse oviduct Shang Wang, and Irina V. Larina Development 2018. 145:None-None; doi: 10.1242/dev.157685 Download Original Video