Understanding Sperm Morphology and Fertility

Sperm morphology refers to the shape and structure of sperm, which can significantly impact a sperm's ability to fertilize an egg. Men with morphologically abnormal sperms have a higher risk of infertility [1].

Healthy sperm have a smooth, oval head and a long tail that helps them swim. Abnormal sperm shapes can affect their ability to reach and fertilize an egg.

It’s normal for some sperm to be morphologically abnormal, but having too many abnormal sperm can lower the chances of conception.

This article explores the difference between morphologically normal and abnormal sperm cells. The article also covers practical ways to improve abnormal sperm morphology and increase the chances of conception.

What is Sperm Morphology?

The term "morphology" is derived from the Greek words "morph" (form) and "ology" (study). Thus, sperm morphology meaning can be the study of the form of sperm.

When studying sperm morphology, we study different aspects of sperm cells, including their shape, structure, and size.

Morphology of sperm is commonly studied during semen analysis, which is a common test for male fertility.

A sperm cell is composed of three main parts:

• Head — carries the genetic material.
• Midpiece — provides energy for movement.
• Tail — propels the sperm towards the egg.

The shape and structure of these parts determine the ability of sperm cells to fertilize an egg. For example, a well-formed head is essential for penetrating the egg, while a strong tail is needed for the moment necessary to reach the egg.

The Role of Sperm Morphology in Male Fertility

Sperm morphology plays a significant role in male fertility. The shape and structure of a sperm cell can impact its ability to fertilize an egg.

A sperm cell with a normal morphology has a better chance of successfully reaching and penetrating the egg. This is because the shape and structure of the sperm cell influence its motility.

Abnormal sperm morphology, such as head or tail defects, can inhibit this process and affect male fertility [2]. For example, a double-headed sperm or a sperm with two tails may struggle to move efficiently. Even if the abnormal sperm cell reaches the egg, it may not be able to penetrate the egg.

In simple words, sperm morphology, just like sperm count,  is vital aspect of male fertility and is a deciding factor for successfull conception.

Normal vs. Abnormal Sperm Morphology

Sperm morphology involves the size and shape of the sperm. Normal morphology of sperm involves an oval head and a long tail [3].

The head of the sperm contains genetic material, while the tail propels the sperm towards the egg. Any deviation from this structure is classified as abnormal sperm morphology.

Abnormal sperm morphology can vary. It can include issues with the head, midpiece, or tail of the sperm.

The Kruger strict criteria is a common standard for assessing sperm morphology [4]. According to this criteria, a man is considered to have normal sperm morphology if 14% or more of his sperm have a normal shape.

However, having lower normal sperm cells than sperm morphology normal range doesn't necessarily mean a man is infertile. Many men with lower percentages of normal sperm can successfully achieve conception.

On the other hand, a higher percentage of abnormal sperm can increase the risk of infertility. Research shows that abnormal sperm cells can also lead to higher miscarriage rates [5].

Characteristics of Abnormal Sperm

Abnormal sperm or abnormal morphology can have a variety of characteristics. Some may have double headed spermatozoa or two tails while others may have a tapered head, amorphous head, or bent tail. Some sperm may have a head that is too big or too small.

These abnormalities can affect the sperm's ability to reach and fertilize an egg. For example, a tapered-head sperm may not be able to penetrate the egg and fertilize it.

Similarly, a two tail sperm may not able to swim efficiently towards the egg. As a result, low morphology sperm cells can contribute to fertility issues.

Causes of Abnormal Sperm Morphology

A variety of factors can contribute to the abnormal sperm morphology or deformed sperm. These can range from genetic issues to lifestyle choices.

Here are some common causes that can lead to sperm defects or abnormal sperm morphology:

• Genetic Issues: Genetic issues are a major factor in causing sperm abnormalities. For example, a genetic condition called Klinefelter syndrome can affect sperm production and result in abnormal sperm morphology [6].
• Environmental Factors: Environmental factors such as exposure to toxins and pollutants can negatively affect sperm quality [7]. This includes exposure to industrial chemicals, heavy metals, and radiation.
• Lifestyle Choice: Poor lifestyle choices such as smoking, alcohol consumption, use of recreational drugs, poor diet, and lack of exercise can contribute to the formation of misshapen sperms [8]. Studies show that overheating of testicles due to tight clothing can also cause abnormal sperm morphology.
• Medical Conditions: Certain medical conditions can also affect sperm morphology. For example, varicocele, a swelling of the veins in the scrotum, can cause a rise in testicular temperature that affects sperm production and morphology [9].

It's important to note that not all causes of abnormal spermatozoa are known. In some cases, there may not be any apparent cause of abnormal sperm morphology. Therefore, you must seek medical advice if you are experiencing fertility issues.

Testing for Sperm Morphology

Semen analysis is a common male fertility test that includes the study of sperm morphology. This test includes evaluation of various aspects of a man's semen and the sperm it contains.

During the test, a semen sample is collected and examined under a microscope. The doctor then evaluates the shape and structure of the sperm through sperm morphology microscope data. This includes checking the size and shape of the sperm's head, midpiece, and tail.

The results usually show a percentage. This percentage tells you how many sperm have a normal shape out of all the sperm in the semen sample. The World Health Organization says a normal result is when more than 4% of the sperm have a normal shape [10]. Anything below 4% is in the abnormal sperm morphology range.

However, it's important to remember that semen morphology is just one aspect of semen quality. Other factors, such as sperm count and motility, also play a deciding role in male fertility.

How to Correct Sperm Morphology

Improving sperm morphology involves a combination of dietary changes and lifestyle changes and nutritional supplements. However, while everyone can follow these strategies, they may not  work for everyone.

Here are a few practical tips to improve sperm morphology:

1. Dietary Changes for Sperm Morphology

Eating a balanced diet rich in antioxidants, vitamins, and minerals can support healthy sperm development.

Foods like fruits, vegetables, nuts, and whole grains provide essential nutrients like zinc, vitamin C, and folate, which can enhance sperm shape and quality.

Reducing processed foods, trans fats, and excessive alcohol can also help improve sperm morphology, leading to overall improved fertility status.

2. Lifestyle Changes for Sperm Morphology

Maintaining a healthy body weight is essential for optimal sperm health. Obesity can negatively impact sperm morphology and overall fertility.

Smoking and excessive alcohol consumption can also harm sperm health. Therefore, quitting smoking and limiting alcohol intake can improve sperm morphology.

Regular physical activity can also improve overall sperm health. However, excessive exercise can have the opposite effect, so adopt a balanced approach for maximum benefits and minimum risk.

3. Supplements for Sperm Morphology

Fertility supplements can help improve sperm morphology by providing essential nutrients required for healthy sperm production. These include antioxidants like vitamins C and E, which can protect sperm from oxidative stress.

Zinc and folic acid are also important for sperm health and play a significant role in the formation and maturation of sperm.

Omega-3 fatty acids, found in fish and flaxseeds, can also positively influence sperm morphology. However, it's important to consult a healthcare professional before starting any new supplement plan.

Assisted Reproductive Technologies (ART) and Sperm Morphology

Assisted Reproductive Technologies (ART) can be a practical option for couples facing challenges with conception due to sperm morphology [11]. Techniques such as Intrauterine Insemination (IUI) and In Vitro Fertilization (IVF) can help overcome these issues.

In particular, Intracytoplasmic Sperm Injection (ICSI) is often used in IVF to overcome sperm morphology issues. This technique involves injecting a single sperm directly into an egg, bypassing the need for the sperm to penetrate the egg on its own.

However, it's important to discuss abnormal sperm morphology treatment options with a healthcare professional to understand the potential risks and benefits.

When to See a Specialist

If you're having trouble conceiving and suspect sperm morphology might be a factor, it's important to consult a fertility specialist. They can conduct a semen analysis to assess sperm health, including morphology.

Specialists such as urologists and reproductive endocrinologists can guide you on further diagnosis and treatment options. They can also guide you about your results and planning the next steps.

Remember, early detection and intervention can be key in addressing male fertility issues. So, don't hesitate or feel embarrassed in discussing your reproductive health with your doctor.

FAQs

1. How to get pregnant with poor sperm morphology?

Assisted reproductive technologies, such as IVF, can significantly improve the chances of conception with poor sperm morphology. These methods allow for selecting and using the healthiest sperm to enhance the likelihood of a successful pregnancy.

2. Can abnormal sperm fertilize an egg?

Abnormal sperm can sometimes fertilize an egg, but it may reduce the chances of successful fertilization and lead to complications.

3. What does the sperm morphology 1 percent result of sperm analysis test indicate?

Sperm morphology 1 percent indicates that less than one percent of your sperm cells have a normal morphology.

4. Can personal lubricant damage sperm?

Yes, regular lubricant can cause a barrier to sperm penetration resulting in oxidative stress and interference with the membrane of the sperm flagella. Even some lubricants labelled as sperm friendly may still cause damage. FDA cleared Conceive Plus fertility lubricant is one fertility friendly lubricant that is proven to not harm sperm.

Conclusion

Sperm morphology is a key aspect in fertility and a major factor for successful conception. Abnormal sperm shape can make it harder to conceive. However, keep in mind that sperm morphology is not the only aspect of male fertility and there are several other essential factors, such as sperm count.

Improving sperm health can involve lifestyle changes, supplements, or medical treatments. Consulting a healthcare professional is important for personalized advice and treatment. With patience and a positive outlook, you can successfully navigate fertility challenges. Remember, you’re not alone, and support is available.

Resources Used

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