Video 2.
Movie of Pih1d3−/− sperm. Motility of Pih1d3−/− sperm was examined by EMCCD camera (iXon+; Andor Technology) with a halogen lamp via an intravital microscope (AF DMI 6000B; Leica). The images were captured at 30 frames/s during 5 s. The Pih1d3−/− sperm were immotile.