Figure 5: At the first outlet-down, the number of collection of motile sperm was less due to the faster flow velocity. And then, the multi-outlet dispersed flow let flow velocity slower at second and third outlet-down. Therefore, the more motile sperm was collected there. (a) The tracking picture of the motile sperm collected during 1.38 second. (b) The dead sperm separation. (Blue circle: the motile sperm collected).