What Causes Low Sperm Count and Can It Be Treated?

Low sperm count is a common concern for men who are trying to conceive, yet it is often not discussed openly. Learning that sperm count may be affecting fertility can raise questions about the causes, potential impact and whether it can be treated.

The good news is that low sperm count can often be managed, especially when the underlying cause is identified early. Understanding what contributes to this condition and the treatment options available can help you take informed steps towards improving your fertility.

Key Takeaways

• Low sperm count (oligospermia) is defined as fewer than 15 million sperm per millilitre of semen and can reduce the chances of fertilisation, but does not always mean infertility.
• Pregnancy is still possible with low sperm count, especially if sperm movement (motility) and shape (morphology) are healthy.
• Common causes include hormonal imbalances, medical conditions (such as varicocele or infections), lifestyle factors (smoking, alcohol, stress), structural issues, and certain medications or treatments.
• Diagnosis typically involves semen analysis, supported by medical history, physical examination, hormone blood tests, and sometimes imaging or genetic testing.
• Treatment depends on the underlying cause and may include medication, hormone therapy, surgery, lifestyle changes, or assisted reproductive techniques like IVF or ICSI.
• Early evaluation improves outcomes, as identifying and treating the cause promptly can increase the chances of conception.
• See a specialist if you have been trying to conceive for 12 months without success or have known risk factors such as prior testicular issues, abnormal semen results, or reproductive health concerns.
• Personalised care is important, as many cases involve multiple contributing factors and benefit from a tailored treatment approach.

What Is Low Sperm Count and How Does It Affect Fertility?

Low sperm count, or oligospermia, means there are fewer sperm than normal in the semen, which can reduce the chances of fertilising an egg and affect overall fertility. Clinically, low sperm count is defined as fewer than 15 million sperm per millilitre of semen.

For conception to occur, sperm must not only be present in adequate numbers but also move effectively and have a normal structure. Even with a lower sperm count, pregnancy may still be possible if sperm motility (movement) and morphology (shape) are within a healthy range.

Low sperm count is one of several factors that can affect men’s reproductive health, particularly reproductive function. It is also important to note that it does not always mean infertility, as many men with reduced sperm levels can still conceive naturally, although it may take longer.

What Causes Low Sperm Count?

Low sperm count can be caused by a combination of medical, hormonal, lifestyle and environmental factors. Identifying the underlying cause is important, as it helps guide the most appropriate treatment approach.

Common causes of low sperm count include:

• Hormonal Imbalances

  Hormones such as testosterone play a key role in sperm production. Imbalances involving the testes, pituitary gland or thyroid can disrupt this process and reduce sperm count.

• Medical Conditions

  Certain health conditions can affect sperm production or function. These include varicocele (enlarged veins in the scrotum), infections, genetic disorders and chronic illnesses that impact overall reproductive health.

• Lifestyle and Environmental Factors

  Daily habits and environmental exposures can influence sperm production. Factors such as smoking, excessive alcohol intake, stress, poor diet and exposure to heat or toxins may contribute to reduced sperm count.

• Structural or Functional Issues

  Blockages in the reproductive tract can prevent sperm from being released properly. Functional issues, including problems with ejaculation, may also affect sperm delivery.

• Medications and Medical Treatments

  Certain medications, including anabolic steroids and some long-term prescriptions, can interfere with hormone levels and sperm production. Treatments such as chemotherapy or radiation therapy may also have an impact.

In some cases, low sperm count may be due to multiple contributing factors, or no clear cause may be identified. A thorough evaluation by a specialist can help determine the underlying reason and guide the next steps for management.

How Is Low Sperm Count Diagnosed?

Low sperm count is diagnosed through a combination of clinical evaluation and laboratory tests, with semen analysis being the most important step.

The diagnostic process typically includes:

• Semen Analysis

  This is the primary test used to assess sperm count. It measures the number of sperm present, as well as their movement (motility) and shape (morphology). In many cases, the test may be repeated to confirm results, as sperm levels can vary.

• Medical History and Physical Examination

  A specialist will review your medical history, lifestyle factors and any previous health conditions that may affect sperm production. A physical examination may also be performed to check for signs of conditions such as a varicocele.

• Blood Tests

  Blood tests are used to evaluate hormone levels, including testosterone and other hormones that regulate sperm production. This helps identify any hormonal imbalances.

• Imaging Tests

  In some cases, imaging such as a scrotal ultrasound may be recommended to detect structural abnormalities, including blockages or issues affecting the testes.

• Additional Tests (If Needed)

  Further tests, such as genetic testing or sperm function tests, may be carried out if initial results do not clearly explain the cause.

A thorough diagnosis is essential, as it helps identify the underlying cause and allows specialists to recommend targeted treatments to improve fertility outcomes.

Can Low Sperm Count Be Treated?

Yes, low sperm count can often be treated, depending on the underlying cause. A personalised approach is important, as treatment is tailored to address specific factors affecting sperm production or delivery.

Treatment options may include:

• Medical Treatment

  Medications or hormone therapy may be prescribed to correct hormonal imbalances or improve sperm production. Infections affecting the reproductive system can also be treated with appropriate medication.

• Surgical Treatment

  Surgical procedures may be recommended for structural issues. For example, varicocele repair can improve sperm production, while procedures to remove blockages can help restore sperm flow.

• Lifestyle Modifications

  Improving lifestyle factors such as maintaining a healthy weight, reducing alcohol intake, quitting smoking and managing stress can support sperm health. While these changes alone may not resolve all cases, they can enhance overall treatment outcomes.

• Assisted Reproductive Techniques

  If natural conception is not possible, assisted methods such as in-vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) may be recommended. These techniques can help overcome issues related to sperm count or function.

In many cases, a combination of treatments may be used to optimise results. Early evaluation and appropriate management can significantly improve the chances of conception.

When Should You See a Specialist for Low Sperm Count?

You should consider seeing a specialist if you have been trying to conceive without success or if there are known concerns about sperm health. Early evaluation can help identify underlying causes and improve treatment outcomes.

You may benefit from a specialist assessment if:

• You have been trying to conceive for 12 months or more without success
• You have a known history of low sperm count or abnormal semen analysis
• You have experienced testicular injury, surgery or infection
• You have symptoms such as pain, swelling or lumps in the testicular area
• You have underlying medical conditions that may affect fertility
• You have concerns related to men’s health, including reproductive or hormonal issues

Understanding Your Options for Low Sperm Count Treatment

Low sperm count can be concerning, but many underlying causes can be identified and managed with the right approach. From medical treatments to advanced reproductive techniques, tailored care can help improve your chances of conception.

At the International Urology, Fertility and Gynaecology Centre, we focus on delivering personalised fertility care supported by advanced diagnostic and treatment strategies. The team is led by Dr Michael YC Wong, a highly respected urologist who has held key leadership roles across Asia, including positions within the Urological Association of Asia and the Asian School of Urology. If you have concerns about low sperm count or reproductive health, arrange a consultation with us for a personalised evaluation and treatment plan.

FAQs About Low Sperm Count