Progressive motility of sperm is typically measured as the percentage of sperm that exhibit forward progression in a given sample, and is an important parameter in assessing male fertility.
Progressive motile sperm cells are sperm cells that are able to move forward in a straight line in a coordinated and purposeful manner, which is necessary for successful fertilization. These sperm cells have a defined head, midpiece, and tail, which enable them to swim through the female reproductive tract and reach the egg for fertilisation.