Causes of Slow Sperm Motility

Causes of Slow Sperm Motility
Illustration of sperm motility. Credit: Freepik

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Sperm motility, which refers to the ability of sperm to move actively, is a crucial factor in achieving a successful pregnancy. Healthy sperm must be able to move effectively to reach the egg for fertilization.

When sperm movement is slow, the natural process of fertilization becomes more difficult, decreasing the chances of pregnancy.

 

What is Sperm Motility?

Sperm motility refers to the ability of sperm to swim quickly and efficiently towards the egg. High-quality sperm are characterized by their swift movement, which is necessary to reach and fertilize the egg. Slow or irregular sperm movement can be a significant cause of fertility problems in men.
 

Causes of Slow Sperm Motility

Several factors can lead to decreased sperm motility, with influences ranging from lifestyle choices to underlying medical conditions.

Here are some common factors that often affect sperm motility:

Smoking Habits

Smoking can significantly reduce sperm quality because it introduces toxic chemicals like nicotine and cadmium into the body. These substances increase oxidative stress, which damages sperm DNA and affects sperm structure, reducing their motility and function.

Obesity 

Excess body fat can raise the temperature around the scrotum, which interferes with the hormonal balance required for sperm production. Obese individuals may experience slower and less efficient sperm movement as a result.

Medical Conditions

Certain medical conditions such as varicoceles (similar to varicose veins in the scrotum), reproductive tract infections, hormonal imbalances, and genetic disorders can negatively impact sperm motility. For example, varicoceles can cause an increase in temperature around the testicles, which harms sperm health and motility.

Age Factor

As men age, sperm quality naturally declines. The aging process also leads to greater DNA damage in sperm due to the accumulation of free radicals, affecting both their motility and overall function.

Irregular Ejaculation Patterns

If a man does not ejaculate for extended periods, the sperm stored in the body may age, leading to decreased motility. When ejaculation finally occurs, the sperm may be of lower quality and less effective in fertilizing an egg.

Conversely, ejaculation too frequently can also lower sperm volume and concentration because the body does not have enough time to produce and store new sperm. Although pregnancy is still possible, the sperm concentration may be lower.

High Temperature

High temperatures caused by factors such as tight clothing, placing a laptop on the lap, or prolonged exposure to hot water can decrease sperm motility and quality. While the effects are temporary, keeping the scrotum cool is crucial for preserving male fertility.
 
 

How to Treat Slow Sperm Motility?

If you're experiencing difficulty getting pregnant, low sperm motility should be considered as a possible factor. The first step is to consult a urologist or andrologist. A thorough examination will help identify the exact cause, ensuring that treatment is tailored to your specific needs.

Once the doctor determines that sperm motility is an issue, they will typically recommend lifestyle changes, supplements, and possible treatments based on the individual’s condition.

If these approaches don't yield results, artificial insemination or in vitro fertilization (IVF) may be considered to improve the chances of conception.

 

While slow sperm motility can be a challenge, with the right treatment and lifestyle adjustments, there is still an opportunity to improve sperm quality and successfully achieve pregnancy.

If you are facing fertility issues, consult a doctor or use the consultation feature available on the Ai Care app, which can be downloaded via the App Store or Play Store.

 

Looking for more information about other diseases? Click here!

 

 

Writer : Agatha Writer
Editor :
  • dr Hanifa Rahma
Last Updated : Monday, 2 June 2025 | 10:37
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