Male Infertility
Difficulty fathering a child, often from treatable sperm or hormone problems
Quick Facts
- Type: Reproductive sign
- Common causes: Sperm problems, varicocele, hormones
- Often: No outward symptoms
- See a doctor: No conception after about a year of trying
Overview
Male infertility refers to a man's reduced ability to cause pregnancy in a fertile partner. It is usually defined as not achieving conception after about a year of regular, unprotected sex. Infertility is common and affects many couples, and a male factor contributes in a significant proportion of cases — sometimes alone and sometimes alongside a female factor.
Most male infertility comes down to problems with making healthy sperm, the quality or number of sperm, or delivering sperm during ejaculation. Often there are no other symptoms, and the issue is discovered only when a couple has trouble conceiving. Many causes are identifiable and treatable, and assisted reproductive techniques can help in cases that cannot be fully corrected.
Fertility is a shared matter, and evaluating both partners together gives the clearest picture, since a male factor, a female factor, or both may be involved. For men, the process of making sperm is gradual and sensitive to health, hormones, temperature, and lifestyle, so improvements in these areas can sometimes help over a few months. Seeking evaluation is not a sign of failure but a practical step that often reveals a treatable cause and opens up options for building a family.
Common Causes
Male infertility can have many causes affecting sperm production, quality, or delivery:
- Sperm problems: Low sperm count, poor movement, or abnormal shape.
- Varicocele: Enlarged scrotal veins, a common and often treatable cause.
- Hormonal imbalances: Problems with testosterone or other hormones that regulate sperm production.
- Blockages: Obstruction of the tubes that carry sperm.
- Infections and illnesses: Some infections, past mumps, or other conditions can affect fertility.
- Lifestyle and exposures: Smoking, heavy alcohol use, certain drugs, heat, obesity, and some medications.
- Genetic conditions: Less commonly, inherited factors.
Associated Symptoms
Male infertility often has no symptoms beyond difficulty conceiving, but some men have signs of an underlying cause:
- A lump, swelling, or aching in the scrotum (as with a varicocele)
- Problems with sexual function, such as low libido or erectile difficulties
- Reduced facial or body hair or other signs of hormonal imbalance
- A history of testicular injury, surgery, or infection
- Reduced volume of ejaculate or pain during ejaculation
These signs can point toward a treatable cause and are worth mentioning during evaluation.
Diagnosis & Evaluation
Evaluation aims to identify the cause and guide treatment, often alongside assessment of the partner.
- Medical and sexual history: Including past illnesses, surgeries, medications, and lifestyle.
- Physical exam: Checking the testicles and scrotum, including for a varicocele.
- Semen analysis: The key test, measuring sperm count, movement, and shape, usually on more than one sample.
- Hormone tests: Blood tests for testosterone and related hormones.
- Imaging and genetic tests: Ultrasound or genetic testing when indicated.
Treatment & Management
Treatment depends on the cause and the couple's goals, and many men can be helped.
- Treating specific causes: Repairing a varicocele, correcting hormonal imbalances, or treating infections or blockages.
- Lifestyle changes: Stopping smoking, reducing alcohol, maintaining a healthy weight, and avoiding excess heat.
- Medications: To address hormonal or other treatable problems.
- Assisted reproduction: Techniques such as intrauterine insemination or in vitro fertilization, including methods to use even small numbers of sperm.
- Counseling and support: Fertility challenges can be stressful, and support is an important part of care.
Self-Care & Prevention
- Avoid smoking, recreational drugs, and excessive alcohol
- Maintain a healthy weight and stay physically active
- Limit exposure to excess heat, such as hot tubs and saunas, and toxins
- Manage long-term health conditions and discuss medications with your doctor
- Seek evaluation early rather than delaying when conception is difficult
When to See a Doctor
See a doctor if you and your partner have not conceived after about a year of regular, unprotected sex, or sooner (after about six months) if your partner is over 35. Seek evaluation earlier if you have:
- A known history of testicular problems, surgery, or injury
- Sexual function problems, such as erectile or ejaculation difficulties
- A lump, swelling, or pain in the scrotum
- Signs of a hormonal problem
Male infertility itself is not an emergency, but sudden severe testicular pain or a new scrotal lump should be evaluated promptly.
Frequently Asked Questions
What causes male infertility?
Common causes include low sperm count or poor sperm quality, varicocele (enlarged scrotal veins), hormonal imbalances, blockages in the sperm-carrying tubes, infections, and lifestyle factors such as smoking and excess heat. Many causes are identifiable and treatable.
Are there symptoms of male infertility?
Often there are none, and the only sign is difficulty conceiving. Some men have signs of an underlying cause, such as a scrotal lump or swelling, sexual function problems, or signs of hormonal imbalance.
How is male infertility diagnosed?
The key test is a semen analysis, which measures sperm count, movement, and shape, usually on more than one sample. A physical exam, hormone blood tests, and sometimes imaging or genetic tests help identify the cause.
Can male infertility be treated?
Often, yes. Treatment may include correcting a varicocele, treating hormonal problems, infections, or blockages, and making lifestyle changes. When conception is still difficult, assisted reproductive techniques can help, sometimes even with very few sperm.
When should we see a doctor about trouble conceiving?
See a doctor after about a year of regular, unprotected sex without conception, or after about six months if the female partner is over 35. Seek earlier evaluation if there is a history of testicular problems, sexual dysfunction, or a scrotal lump.
References
- MedlinePlus, U.S. National Library of Medicine. Male infertility.
- Mayo Clinic. Male infertility — Symptoms and causes.
- American Urological Association. Male infertility.
- Centers for Disease Control and Prevention (CDC). Infertility.