Big Sperm: The Impact of Size of Sperm on Male Fertility

The size of the sperm is very important for the chances of conception. According to reports, the normal human sperm cell has an oval-shaped head that is 3–5 μm long and 2–3 μm wide, a midpiece 7–8 μm long, and a tail 45 μm [1].

These measurements tell about the shape and size of the sperm, which is often called sperm morphology [2]. Sperm morphology is an essential factor for fertilization. Only a sperm with correct morphological properties can swim effectively and reach the egg in the female body.

Big sperm is a type of morphologically abnormal sperm cell that has either a big head or a very long tail. These abnormally shaped and sized sperm cells can’t swim toward the egg or fertilize it efficiently.

What Is A Normal Sperm?

In very simple words, normal sperm refers to the sperm cells that can fertilize an egg and cause pregnancy. There are different parameters that decide whether a sperm is normal [3].

These are:

• Sperm Morphology: Sperm morphology is the study of the shape and size of sperm cells. A normal sperm has an oval head, midpiece, and tail of a certain length.
• Sperm Count: Sperm count is information about how many sperm cells are present per milliliter of semen. A normal sperm count increases the chances of conception, while a lower or zero sperm count can make conception difficult.
• Sperm Motility: Sperm motility is the property of the sperm cells to swim and reach the fallopian tube in the female body, where the egg cell is present.

Thus, a sperm cell is called normal if it has accurate size, shape, motility, and concentration.

What Does Big Sperm Mean?

"Big sperm" refers to sperm that are larger than normal, and this can occur in two ways:

1. Big Head

Sperm with a large head may struggle to penetrate the egg. The enlarged head often carries genetic abnormalities, which can affect its ability to fertilize the egg successfully.

2. Big Tail

Since the tail is vital for sperm cells to swim, an abnormally long tail can negatively impact sperm motility. When a sperm cell can't swim properly, it may not be able to reach the egg, which reduces the chances of fertilization.

Can You Get Pregnant With A Big Sperm?

Yes, it is possible to get women pregnant with a big sperm, but it may be more challenging. If the sperm has a big head or tail, it could struggle to swim to the egg. However, if it reaches the egg and is healthy, pregnancy is still possible.

That said, big sperm may not work as well as normal-sized sperm. This can lower the chances of getting pregnant. If there are ongoing concerns about sperm size or function, it’s a good idea to talk to a doctor.

How to Improve Sperm Morphology?

Here are four practical ways you can improve sperm morphology and increase your chances of conception:

1. Eat a Healthy Diet

Studies show that oxidative stress can damage sperm cells and cause problems with sperm morphology [4]. Antioxidant-rich diets such as fruits, vegetables, and whole grains can protect sperm from damage by oxidative stress.

2. Exercise Regularly

Staying active helps maintain a healthy weight and supports better hormone levels, which can positively affect sperm quality and morphology.

3. Avoid Toxins

Limiting exposure to environmental toxins, like chemicals and pollution, can help prevent damage to sperm and improve their overall health.

4. Fertility Supplements

Male fertility supplements provide essential nutrients such as zinc, folic acid, and vitamin C. Evidence shows that these nutrients improve sperm morphology and boost male fertility [5].

Conclusion: Big Sperm And Male Fertility

The size of a sperm is equally important for successful fertilization as other parameters, such as sperm count and sperm motility. When a sperm cell is abnormally big in size, it can't swim efficiently in the female reproductive tract.

The size of sperm not only impacts sperm motility, but a bigger head also makes it hard for a sperm cell to fertilize the egg when sperm meets the egg. If you are trying to conceive, focus on improving sperm morphology with required lifestyle changes.  

Resources Used

1. Sunanda, P., Panda, B., Dash, C., Padhy, R. N., & Routray, P. (2018). An illustration of human sperm morphology and their functional ability among different group of subfertile males. Andrology, 6(5), 680-689. https://doi.org/10.1111/andr.12500 
2. Bashir, S. (2024g, August 26). Understanding Sperm Morphology and Fertility. Conceive Plus®. https://conceiveplus.com/blogs/blog/sperm-morphology-and-fertility 
3. Omu, A. E. (2013). Sperm Parameters: Paradigmatic Index of Good Health and Longevity. Medical Principles and Practice, 22(Suppl 1), 30-42. https://doi.org/10.1159/000354208 
4. Walke, G., Gaurkar, S. S., Prasad, R., Lohakare, T., & Wanjari, M. (2023). The Impact of Oxidative Stress on Male Reproductive Function: Exploring the Role of Antioxidant Supplementation. Cureus, 15(7). https://doi.org/10.7759/cureus.42583 
5. Bashir, S. (2024r, September 8). What Vitamins Should A Man Take When Trying To Conceive. Conceive Plus®. https://conceiveplus.com/blogs/blog/what-vitamins-should-a-man-take-when-trying-to-conceive