Which statement best defines progressive motility in semen analysis?

Which statement best defines progressive motility in semen analysis?

• A. Spermatozoa moving actively, either linearly or in a large circle.
• B. Spermatozoa that are immotile.
• C. Spermatozoa moving slowly in place.
• D. All sperm motility regardless of direction.

Answer: (A)

Progressive motility means sperm are moving actively with forward progression, either in a straight line or along a broad, curving path that still advances toward the target. This distinguishes forward-moving sperm from those that are immotile, or those that move but do not progress forward (for example, slow movement in place). It also differs from total motility, which includes all moving sperm regardless of direction. So the best definition is sperm moving actively, either linearly or in a large circle, because that describes forward, purposeful movement essential for fertilization.

Progressive motility means sperm are moving actively with forward progression, either in a straight line or along a broad, curving path that still advances toward the target. This distinguishes forward-moving sperm from those that are immotile, or those that move but do not progress forward (for example, slow movement in place). It also differs from total motility, which includes all moving sperm regardless of direction. So the best definition is sperm moving actively, either linearly or in a large circle, because that describes forward, purposeful movement essential for fertilization.