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. 2005 May 3;4(2):161–168. doi: 10.1111/j.1447-0578.2005.00092.x

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This schema depicts the motion of human spermatozoa. Progressive velocity is the distance from the starting point to ending point. Progressive motility is the percentage of sperm with a progressive velocity of 50 µm s⁻¹ or more. Path velocity is the curve obtained by connecting the mean coordinates of five consecutive frames divided by the measurement time. Track speed () is defined as the total distance of the straight line connecting the consecutive coordinates on the frame divided by the measurement time.

Inline graphic — This schema depicts the motion of human spermatozoa. Progressive velocity is the distance from the starting point to ending point. Progressive motility is the percentage of sperm with a progressive velocity of 50 µm s⁻¹ or more. Path velocity is the curve obtained by connecting the mean coordinates of five consecutive frames divided by the measurement time. Track speed () is defined as the total distance of the straight line connecting the consecutive coordinates on the frame divided by the measurement time.