Normal sperm motility refers to the ability of sperm to move effectively, which is crucial for fertilization. According to the University of Utah Health, a semen analysis assesses several factors, including sperm motility.
Here's a breakdown of what constitutes normal sperm motility:
Normal Sperm Motility Values
According to the reference, here is the table summarizing the normal values in a semen analysis:
| Standard Test | Normal Value |
|------------------------|----------------------|
| Sperm Concentration | 20,000,000 or more/mL |
| Total Motility | 40% or more |
| Total Progressive Motility | 32% or more |
| Morphology | 4% or more normal |
- Total Motility: This refers to the percentage of sperm that are moving, regardless of the direction of their movement.
- A normal total motility is 40% or more.
- Total Progressive Motility: This is the percentage of sperm that are moving forward in a straight line or large circles.
- A normal total progressive motility is 32% or more.
Understanding the Importance of Motility
- Fertilization: Sperm motility is vital for sperm to travel through the female reproductive tract and reach the egg for fertilization.
- Assessment: Doctors use semen analysis, which includes motility assessment, to evaluate male fertility.
- Types of Motility:
- Progressive Motility: Sperm move in a straight line or large circle.
- Non-Progressive Motility: Sperm move but do not make much forward progress; the tail may wiggle without propulsion.
- Immotility: Sperm do not move.
What Happens if Motility is Low?
Low sperm motility, also known as asthenozoospermia, can make it difficult for sperm to reach the egg. This can contribute to male infertility.
How is Motility Determined?
Semen analysis is performed in a lab, where technicians use a microscope to assess sperm motility.
