Understanding Male Infertility

When couples struggle to conceive, the focus often falls immediately on the woman.

However, according to our Sunfert Group Medical Director Dr Eeson Sinthamoney, that male factor infertility contributes to approximately 50% of all infertility cases.

Male infertility refers to a man’s reduced ability to help achieve pregnancy due to issues with sperm production, quality or delivery.

This can be due to many factors such as:

• Sperm quality: Poor sperm quality affects fertilisation and embryo development.
• Sexual dysfunction: Conditions such as erectile dysfunction or ejaculation problems can interfere with the delivery of sperm during intercourse.
• Hormonal issues: Imbalances in hormones which affect the sperm production.
• Anatomical obstructions: Blockages in the reproductive tract, varicocele (enlarged veins in the scrotum), infections, congenital issues or structural abnormalities that affect sperm delivery.
• Lifestyle factors: Smoking, excessive alcohol intake, obesity, poor diet, stress, lack of sleep, and drug use, which may reduce sperm quality.
• Environmental factors: Exposure to heat, radiation, chemicals, toxins, or heavy metals that can negatively impact sperm production and DNA quality.

Sperm issues can significantly affect a man’s ability to achieve pregnancy because healthy sperm are essential for fertilising an egg and supporting early embryo development.

Even when intercourse is regular and well-timed, problems with sperm can reduce the chances of conception.

Common sperm-related issues include:

• Low sperm volume: When the number of sperm is too low, fewer sperm are available to reach and fertilise the egg, lowering the chance of pregnancy through natural conception.
• Poor sperm motility: Sperm must be able to swim effectively through the female reproductive tract. Reduced movement makes it difficult for sperm to reach the egg.
• Abnormal sperm morphology: Sperm with irregular shape or structure may have difficulty penetrating the egg or completing fertilisation.
• High sperm DNA fragmentation: Damage to the DNA inside the sperm can affect fertilisation, embryo quality, implantation, and may increase the risk of miscarriage, even if other semen parameters (sperm volume, motility, morphology) appear normal.

Sexual Dysfunction, including erectile dysfunction and ejaculation problems, can significantly reduce a man’s ability to conceive naturally.

Common sexual dysfunction that affect fertility:

• Erectile dysfunction: Difficulty maintaining an erection which can hinders the ability to conceive naturally, especially during the fertile window.
• Retrograde ejaculation: Sperm enters the bladder instead of being released through the penis, preventing fertilisation.
• Pre-mature ejaculation: Ejaculation occurs too early, making it harder for sperm to reach the egg.

Even men with healthy sperm may struggle to achieve pregnancy if these sexual dysfunctions are present.

Hormonal imbalances can significantly impact male fertility by disrupting the production and development of sperm.

Key reproductive hormones such as testosterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH) help make healthy sperm, and an imbalance can cause fewer sperm or sperm that don’t swim properly.

Common hormonal causes include:

• Low testosterone levels: Can affect sperm production and sexual function.
• Imbalances in FSH or LH: May weaken testicular function and sperm development.
• Other endocrine disorders: Conditions like diabetes, thyroid problems, or pituitary gland issues can indirectly affect fertility.

Anatomical obstructions in the male reproductive system can block the passage of sperm, making it difficult or impossible for sperm to reach the egg.

These blockages can occur in the vas deferens, epididymis, or other parts of the reproductive tract and may result from infections, inflammation, surgery, or congenital conditions.

Common anatomical issues include:

• Blockages in the reproductive tract: Prevent sperm from being released during ejaculation.
• Varicocele: Enlarged veins in the scrotum that can increase testicular temperature and reduce sperm production and quality.
• Structural abnormalities: Malformations of the testes or reproductive organs that interfere with sperm delivery.

Lifestyle habits can play a major role in male fertility because they directly affect sperm quality, quantity, and overall reproductive health.

Even men with no underlying medical conditions can experience reduced fertility if lifestyle factors are not managed.

Common lifestyle factors that impact male fertility include:

• Smoking: Can damage sperm DNA and reduce sperm count and motility.
• Excessive alcohol consumption: Affects hormone levels and sperm production.
• Obesity and poor diet: Can lead to hormonal imbalances and lower sperm quality.
• Stress and lack of sleep: Chronic stress and inadequate rest may reduce sperm production.
• Drug use or exposure to recreational substances: Can impair sperm formation and function.

Environmental factors can negatively impact male fertility by interfering with sperm production, quality, and DNA integrity.

Even men with healthy lifestyles and no medical conditions may experience fertility issues if exposed to certain environmental hazards over time.

Common environmental factors that affect male fertility include:

• Excessive heat: Frequent use of hot tubs, saunas, or prolonged exposure to high temperatures can reduce sperm production.
• Radiation exposure: Radiation can damage sperm DNA.
• Chemical and toxin exposure: Pesticides, industrial chemicals, heavy metals (like lead or mercury), and other toxins can harm sperm formation and quality.
• Air pollution: Long-term exposure to polluted air may affect hormone levels and sperm health.

You should consider seeking medical advice if you and your partner have been unable to conceive after 12 months of regular, unprotected intercourse. 

You should also see a fertility specialist sooner if you notice:

• Problems with sexual function: Difficulty maintaining an erection, ejaculation issues, or pain during intercourse.
• History of reproductive disorders: Past infections, surgeries, or conditions such as varicocele.
• Abnormal testicular development: Small, soft, or uneven testes.
• Chronic health conditions: Diabetes, thyroid problems, or hormonal imbalances that may affect your fertility.
• Exposure to risk factors: Lifestyle habits, environmental hazards, or medications that could impact sperm quality.

Early evaluation can help identify underlying causes and improve your chances of successful treatment.

Ready to take the next step in your fertility journey? 

Let explore Sunfert’s Fertility Assessment today.