Male Infertility: Causes, Diagnosis, and Treatment Options

Understanding Male Infertility

Male infertility is a contributing factor in approximately 40-50% of all infertility cases. Despite this, male infertility remains underdiagnosed and undertreated, partly due to the misconception that fertility issues are primarily a female concern.

Infertility is defined as the inability to conceive after 12 months of regular, unprotected intercourse. When a couple faces difficulty conceiving, both partners should be evaluated simultaneously — yet in practice, male evaluation is often delayed or overlooked.

At Yaal Fertility Centre, we take a comprehensive approach to male infertility, ensuring that the male partner is thoroughly evaluated alongside the female partner from the very first consultation.

Common Causes of Male Infertility

Male infertility can result from problems with sperm production, sperm transport, or sperm function. The most common causes include:

Sperm Production Issues

Varicocele is the most common treatable cause of male infertility, present in approximately 15% of all men and 35% of men with primary infertility. A varicocele is an enlargement of veins within the scrotum (similar to varicose veins), which raises testicular temperature and impairs sperm production. It can reduce sperm count, motility, and morphology.

Hormonal imbalances — low testosterone, elevated prolactin, thyroid dysfunction, or pituitary disorders can impair sperm production. These are often treatable with medication.

Genetic conditions — Klinefelter syndrome (47,XXY), Y chromosome microdeletions, and other chromosomal abnormalities can severely affect sperm production. Genetic testing can identify these conditions.

Testicular failure — caused by undescended testes (cryptorchidism), testicular torsion, infections (mumps orchitis), or prior chemotherapy/radiation. Depending on the severity, sperm production may be partially or completely impaired.

Medications and substances — anabolic steroids, certain antidepressants, anti-androgens, and recreational drugs (marijuana, cocaine) can suppress sperm production. In many cases, sperm production recovers after stopping the offending substance.

Sperm Transport Issues

Obstructive azoospermia — complete absence of sperm in the ejaculate due to blockages in the vas deferens, epididymis, or ejaculatory ducts. Causes include prior vasectomy, infections, congenital absence of vas deferens (CAVD, associated with cystic fibrosis), or surgical complications.

Ejaculatory dysfunction — retrograde ejaculation (semen enters the bladder instead of exiting through the penis), premature ejaculation, or erectile dysfunction can prevent effective delivery of sperm.

Sperm Function Issues

Poor sperm motility (asthenozoospermia) — sperm cannot swim effectively to reach and fertilize the egg. This can be caused by structural defects in the sperm tail, infections, or exposure to toxins.

Abnormal sperm morphology (teratozoospermia) — high percentage of abnormally shaped sperm, which may be less able to fertilize an egg. Strict morphology criteria (Kruger) classify less than 4% normal forms as abnormal.

High sperm DNA fragmentation — damage to the DNA within sperm cells, even when conventional semen parameters appear normal. This can lead to fertilization failure, poor embryo development, recurrent miscarriage, and failed IVF cycles.

Lifestyle and Environmental Factors

• Obesity — excess weight increases estrogen levels, raises scrotal temperature, and impairs sperm production
• Smoking — reduces sperm count by 15-20% and increases DNA fragmentation
• Excessive alcohol — more than 14 units per week can impair testosterone production and sperm quality
• Heat exposure — prolonged hot baths, saunas, tight underwear, or laptop use on the lap
• Occupational exposures — pesticides, heavy metals, radiation, or industrial chemicals
• Stress — chronic stress affects hormonal balance and sperm quality
• Age — while men can father children later in life, sperm quality (DNA fragmentation, motility) declines gradually after age 40

Diagnosing Male Infertility

A thorough evaluation of male infertility at Yaal Fertility Centre includes:

Semen Analysis

The cornerstone of male fertility evaluation. A semen sample is analyzed for:

At least two semen analyses, 2-4 weeks apart, are recommended before drawing conclusions, as semen parameters can vary significantly between samples.

Hormonal Testing

Blood tests to assess FSH, LH, testosterone, prolactin, estradiol, and thyroid function. Hormonal imbalances can reveal the underlying cause and guide treatment.

Physical Examination

A urological examination to check for varicocele, testicular size and consistency, presence of vas deferens, and signs of hormonal disorders.

Advanced Testing

• Sperm DNA fragmentation test — assesses the integrity of sperm DNA
• Scrotal ultrasound — evaluates testicular structure and identifies varicoceles
• Genetic testing — karyotype, Y chromosome microdeletion analysis, CFTR gene testing
• Post-ejaculation urinalysis — to check for retrograde ejaculation
• Testicular biopsy — in cases of azoospermia, to determine if sperm production is occurring

Treatment Options

Treatment depends on the underlying cause and severity of the male factor.

Lifestyle Modifications

Often the first step, and sometimes all that is needed:

• Achieve and maintain a healthy BMI (20-25)
• Stop smoking and limit alcohol
• Exercise regularly (but avoid excessive endurance training)
• Switch to loose-fitting underwear
• Avoid hot baths, saunas, and laptops on the lap
• Reduce stress through mindfulness, exercise, or counselling
• Discontinue any anabolic steroids or recreational drugs
• Optimize diet — antioxidants (vitamins C and E, zinc, selenium, CoQ10, L-carnitine) may improve sperm parameters

Lifestyle improvements typically take 2-3 months to reflect in semen parameters, as the sperm production cycle (spermatogenesis) takes approximately 74 days.

Medical Treatment

Hormonal therapy — if testosterone is low, treatment with Clomiphene citrate (off-label) or hCG injections can stimulate endogenous testosterone production and improve spermatogenesis. Direct testosterone replacement should be avoided in men trying to conceive, as it suppresses sperm production.

Antibiotics — if a genital tract infection is identified (leukocytospermia), appropriate antibiotic treatment can improve semen parameters.

Antioxidant supplementation — while evidence is mixed, multiple studies support the use of antioxidant supplements in improving sperm quality and reducing DNA fragmentation.

Surgical Treatment

Varicocelectomy — surgical repair of varicocele, performed microsurgically through a small incision. Success rates for improving semen parameters are 60-70%, with pregnancy rates of 30-40% within 1-2 years post-surgery.

Vasectomy reversal (vasovasostomy) — reconnecting the vas deferens after vasectomy. Success depends on the time since vasectomy — patency rates are 90% if within 3 years, declining to 70% after 8 years.

Surgical sperm retrieval — for men with obstructive or non-obstructive azoospermia:

• TESA (Testicular Sperm Aspiration)
• Micro-TESE (Microsurgical Testicular Sperm Extraction) — the gold standard for non-obstructive azoospermia, with sperm retrieval rates of 40-60%

Assisted Reproductive Technologies

When natural conception is not possible or medical/surgical treatments are insufficient:

IUI (Intrauterine Insemination) — suitable for mild male factor infertility when total motile sperm count after washing is above 5 million. Washed sperm is placed directly in the uterus at the time of ovulation.

IVF (In Vitro Fertilization) — recommended for moderate male factor infertility. Eggs are retrieved and fertilized in the laboratory, bypassing many barriers to natural conception.

ICSI (Intracytoplasmic Sperm Injection) — the treatment of choice for severe male infertility. A single sperm is injected directly into each mature egg, meaning that even men with very few sperm can achieve fertilization. ICSI is used in virtually all cases where sperm is surgically retrieved.

When to See a Specialist

Men should seek evaluation if:

• The couple has not conceived after 12 months of unprotected intercourse (or 6 months if the female partner is over 35)
• There is a known risk factor such as prior varicocele, undescended testes, or groin surgery
• There is a history of infections, sexually transmitted diseases, or testicular trauma
• Erection or ejaculation difficulties are present
• There is a known genetic condition in the family
• Prior cancer treatment was received

Early evaluation saves time. Since male infertility testing is straightforward and non-invasive (semen analysis), there is no reason to delay.

Frequently Asked Questions

Can male infertility be cured?

Many forms of male infertility are treatable or manageable. Hormonal imbalances can be corrected with medication, varicoceles can be surgically repaired, and lifestyle changes can significantly improve sperm parameters. Even when natural conception is not possible, assisted reproductive technologies like IUI, IVF, and ICSI enable most men with male factor infertility to father biological children. The key is accurate diagnosis to determine the most effective treatment approach.

How long does it take for sperm quality to improve?

The sperm production cycle (spermatogenesis) takes approximately 74 days, plus an additional 10-14 days for sperm to mature in the epididymis. Therefore, any intervention — whether lifestyle changes, medication, or surgery — typically takes 2 to 3 months to show measurable improvement in semen parameters. A follow-up semen analysis is usually scheduled 3 months after starting treatment.

Does age affect male fertility?

Yes, though the decline is more gradual than in women. Male fertility begins to decline around age 40, with decreasing testosterone levels, reduced sperm motility, increased sperm DNA fragmentation, and longer time to conception. Men over 45 also have a slightly increased risk of fathering children with certain genetic conditions. While men can technically father children well into their later years, sperm quality does decline with age.

Can stress cause male infertility?

Chronic stress can negatively impact male fertility by disrupting the hormonal balance needed for sperm production. Cortisol (the stress hormone) can suppress testosterone production and impair spermatogenesis. Additionally, stress-related behaviors — poor diet, excessive alcohol, sleep deprivation — compound the effect. Stress management techniques including regular exercise, mindfulness, adequate sleep, and professional counselling when needed can help improve fertility outcomes.

What vitamins help male fertility?

Several supplements have shown evidence of improving sperm parameters: zinc (supports testosterone production), selenium (antioxidant protection), vitamin C and E (reduce oxidative stress), CoQ10 (supports sperm energy metabolism), L-carnitine (improves sperm motility), folic acid (supports DNA synthesis), and omega-3 fatty acids (support sperm membrane health). While individual supplements may have modest effects, a combination approach alongside a healthy diet tends to produce the best results. Always consult your doctor before starting supplements.