Male factor infertility overview

Overview

Male factor infertility means that a man’s health or sperm quality makes it harder for his partner to become pregnant. It’s not a single disease but a term covering many possible problems, from low sperm count to blockages that stop sperm from getting out.

Yes, it’s quite common. Infertility affects about 1 in 7 couples worldwide, and male factors contribute to around half of these cases.

It can affect men of any age, but the risk increases slightly after age 40. It’s most often diagnosed when a couple has been trying for a baby without success for a year or more.

Symptoms

Common symptoms

• Often there are no obvious symptoms – the main sign is difficulty getting a partner pregnant.
• Some men may notice changes in sexual function, like trouble keeping an erection or less interest in sex.
• Rarely, pain, swelling, or a lump in the testicles can occur.

Symptoms in older adults

• Older men may have lower sperm quality and quantity, but the symptoms are the same – usually no symptoms other than difficulty conceiving.

Causes

Main causes

• Varicocele – enlarged veins in the scrotum that can raise the temperature and reduce sperm production.
• Infections or blockages – past infections like mumps or sexually transmitted infections can damage sperm tubes.
• Hormone imbalances – problems with the pituitary gland or testicles that affect sperm-making hormones.
• Genetic conditions – such as Klinefelter syndrome or Y-chromosome deletions.
• Lifestyle factors – smoking, heavy alcohol, obesity, certain medications, and exposure to toxins.

Risk factors

• Smoking cigarettes or using recreational drugs (like marijuana or anabolic steroids).
• Drinking too much alcohol.
• Being overweight or obese.
• Frequent exposure to high heat (saunas, hot tubs, or working in hot environments).
• Having had childhood mumps that affected the testicles.
• A family history of infertility or genetic disorders.

When to see a doctor

See a doctor urgently if:

• If you have sudden testicular pain or swelling – call your local emergency services.
• If you notice a lump or change in the shape of a testicle – see a doctor that day.

Book a routine appointment if:

• If you and your partner have been trying to conceive for 12 months without success (or 6 months if the woman is over 35).
• If you know you have a condition that might affect fertility, like a past testicular injury or chemotherapy.
• If you are concerned about your sexual function or low sex drive.

Diagnosis

A doctor will start with a detailed conversation about your health, medications, lifestyle, and how long you’ve been trying. They’ll do a physical exam, especially feeling the testicles and checking for swelling or varicocele. The main test is a semen analysis.

Tests that may be done

• Semen analysis – checks sperm count, movement (motility), and shape (morphology).
• Blood tests – to measure hormone levels like testosterone and FSH.
• Urinalysis – to look for infection or sperm in the urine.
• Genetic testing – if sperm count is very low, to check for chromosome problems.
• Scrotal ultrasound – to examine the testicles and blood vessels.
• Testicular biopsy – a small sample taken to see if sperm are being made (rarely needed).

What to expect at your appointment

A fertility assessment usually takes a few visits. You’ll be asked not to ejaculate for 2–5 days before the semen test. The process is not painful, but some tests (like blood draw) may cause brief discomfort. Results come back in days to weeks, and your doctor will explain what they mean.

Treatment

Treatment depends on the underlying cause and your general health. Options range from simple lifestyle changes to medical procedures. Many men can father a child with the help of treatments, even if the cause isn’t fully correctable.

Self-care at home

• Stop smoking and avoid recreational drugs.
• Limit alcohol to no more than 2 drinks per day.
• Maintain a healthy weight through diet and exercise.
• Wear loose-fitting underwear and avoid hot baths or saunas.
• Reduce stress and get enough sleep.

Medical treatments

Doctors may prescribe hormone medications to correct imbalances, or antibiotics if an infection is found. For low sperm count or poor quality, assisted conception techniques (where sperm are used to fertilize an egg outside the body) are common. These treatments are done at fertility clinics and are tailored to each couple. Never start any fertility treatment without a doctor’s guidance.

When is surgery considered?

Surgery may be an option for varicocele repair, to remove a blockage in the sperm tubes, or to retrieve sperm directly from the testicles for use in assisted conception.

Living with this condition

Living with infertility can be emotionally challenging. It’s important to communicate openly with your partner and decide together how much support you need. Many couples find it helpful to take breaks from trying for a baby to reduce stress.

Lifestyle tips

• Avoid smoking, heavy drinking, and drugs.
• Keep a healthy body weight with regular exercise (but avoid overheating the testicles).
• Eat a balanced diet rich in fruits, vegetables, whole grains, and healthy fats.
• Try to reduce stress – hobbies, exercise, or talking to a counsellor can help.

Diet and exercise

There’s no special ‘fertility diet’, but eating well supports overall health. Moderate exercise like walking, swimming, or cycling for 30 minutes most days is fine. Avoid very strenuous cycling for long periods, as it may affect the testicles. If you have specific concerns, ask your doctor.

Mental health and emotional wellbeing

Infertility can bring feelings of sadness, guilt, anger, or shame. It’s normal to sometimes feel down. If these feelings last or affect your daily life, talk to your GP or a mental health professional. Remember, you are not alone – many men go through this.

Prevention

Not all causes can be prevented, but you can lower your risk by making healthy lifestyle choices. Early treatment of infections (like STIs) and avoiding heat exposure to the testicles may also help.

Complications

If left untreated

• Ongoing difficulty achieving pregnancy with your partner.
• Emotional stress, depression, or strain on the relationship.
• In rare cases, an underlying condition like a varicocele or infection could get worse and affect testicular function permanently.

Long-term outlook

The outlook is generally good. Many causes of male infertility can be treated or bypassed with modern techniques like assisted conception. Even in cases where the man’s sperm count is very low, there are options. The key is to see a doctor early and work together as a couple. Most men who seek help can eventually become fathers.

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