To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S6. Sperm motility in bovine cervical mucus. Sperm motility in bovine cervical mucus was similar to that in high viscoelasticity medium. Recorded at 100 FPS, replayed at 10 FPS. (Scale bar: 20 μm.) Microgrooves and fluid flows provide preferential passageways for sperm over pathogen Tritrichomonas foetus Chih-kuan Tung, Lian Hu, Alyssa G. Fiore, Florencia Ardon, Dillon G. Hickman, Robert O. Gilbert, Susan S. Suarez, and Mingming Wu PNAS. 2015. 112:5431-5436 DOI: 10.1073/pnas.1500541112 Download Original Video Browse All Videos »