Low Sperm Count: What Doctors Check and What Can Help

A low sperm count—also known as oligospermia—is when the number of sperm cells in a man's ejaculate falls below 15 million sperm per milliliter. While this can affect fertility, it doesn't necessarily mean you can't father a child. Modern medicine offers a range of tests, treatments and lifestyle strategies to help improve sperm production and function. This guide explains what doctors look for, what can help and when to seek professional advice.

What Does "Low Sperm Count" Mean?

• Normal sperm concentration: 15 million to more than 200 million sperm per milliliter
• Mild oligospermia: 10–15 million sperm/mL
• Moderate oligospermia: 5–10 million sperm/mL
• Severe oligospermia: fewer than 5 million sperm/mL

A low count may be temporary or persistent. It's often one piece of the fertility puzzle alongside sperm motility (movement) and morphology (shape).

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Why Sperm Count Matters

• Fertility potential: More sperm increases the odds of fertilizing an egg.
• Indicator of health: Sperm production relies on hormones, testicular health and general well-being.
• Emotional impact: Concern about fertility can cause stress, but many options exist to improve outcomes.

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Common Causes of Low Sperm Count

1. Hormonal Imbalances

   • Low testosterone or irregular levels of FSH, LH and prolactin
   • Pituitary gland disorders

2. Varicocele

   • Enlarged veins in the scrotum that raise testicular temperature

3. Infections

   • Sexually transmitted infections (STIs), epididymitis or prostatitis

4. Obstructions

   • Blockages in the vas deferens or ejaculatory ducts

5. Genetic Factors

   • Y-chromosome deletions or other chromosomal abnormalities

6. Lifestyle and Environmental Factors

   • Smoking, heavy alcohol use and recreational drugs
   • Excessive heat (hot tubs, tight underwear)
   • Poor diet and obesity
   • High stress levels and lack of sleep
   • Exposure to toxins (pesticides, heavy metals)

7. Medications and Treatments

   • Chemotherapy, radiation therapy
   • Anabolic steroids and certain prescription drugs

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What Doctors Check

When you see a specialist—usually a urologist or reproductive endocrinologist—they'll perform a series of evaluations to pinpoint causes and guide treatment.

1. Detailed Medical and Sexual History

• Duration of attempts to conceive
• Past illnesses (mumps after puberty, STIs)
• Medications and supplements
• Lifestyle habits (smoking, alcohol, drug use, occupation)
• Sexual function and frequency of ejaculation

2. Physical Examination

• Testicular size, consistency and position
• Examination for varicocele (often a "bag of worms" feel)
• Check for hernias, penile abnormalities and signs of hormonal issues

3. Semen Analysis

• Volume: Normal is 1.5–5 mL per ejaculation
• Concentration: Sperm count per milliliter
• Motility: Percentage of moving sperm
• Morphology: Percentage of normally shaped sperm
• pH level and white blood cell count (to detect infection)

At least two semen samples, collected several weeks apart, are recommended to confirm results.

4. Hormone Testing

Blood tests to measure:

• Testosterone
• Follicle-stimulating hormone (FSH)
• Luteinizing hormone (LH)
• Prolactin
• Thyroid-stimulating hormone (TSH)

Since hormonal imbalances—particularly low testosterone—are a leading cause of reduced sperm production, you can start by using Ubie's free AI-powered Low Testosterone / Late Onset Hypogonadism symptom checker to understand if your symptoms align with this condition before your doctor's visit.

5. Scrotal Ultrasound

• Detects varicoceles, testicular tumors or blockages
• Assesses blood flow and structural abnormalities

6. Genetic Testing

• Karyotype analysis for chromosomal issues
• Y-chromosome microdeletion studies
• Cystic fibrosis gene mutations (especially if congenital absence of the vas deferens is suspected)

7. Additional Tests

• Post-ejaculatory urinalysis: Checks for sperm in the urine (retrograde ejaculation)
• Infection screening: Urine and blood tests for STIs

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What Can Help: Treatment Options

Many men improve sperm count and quality through targeted therapies and lifestyle adjustments. Your doctor will tailor a plan based on your test results and underlying cause.

Lifestyle Changes

• Stop smoking and limit alcohol
• Maintain a healthy weight (BMI 18.5–24.9)
• Wear loose-fitting underwear and avoid hot baths or saunas
• Reduce stress with mindfulness, therapy or exercise
• Get 7–9 hours of sleep per night
• Optimize nutrition with a balanced diet rich in fruits, vegetables, lean protein and whole grains

Nutritional Supplements

Evidence suggests certain antioxidants and nutrients may support sperm health:

• Vitamin C and E
• Zinc and selenium
• Coenzyme Q10
• L-carnitine
• Folate

Always discuss supplements with your doctor to avoid interactions.

Medical Treatments

• Hormonal therapies:

  • Clomiphene citrate to boost FSH and LH
  • Human chorionic gonadotropin (hCG) injections
  • Testosterone replacement only in select cases (note: external testosterone can lower sperm count)

• Antibiotics: To treat documented infections

• Medication adjustments: Switching or reducing drugs known to impair fertility

Surgical Interventions

• Varicocele repair (ligation or embolization)
• Vas deferens reconstruction for obstructions
• Testicular sperm extraction (TESE) when no sperm appear in ejaculate

Assisted Reproductive Techniques (ART)

When natural conception remains challenging:

• Intrauterine insemination (IUI)
• In vitro fertilization (IVF)
• Intracytoplasmic sperm injection (ICSI), injecting a single sperm into the egg

These methods bypass many barriers and often lead to successful pregnancies.

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Natural Ways to Support Sperm Health

While medical evaluation and treatment are key, everyday choices also play a role:

• Stay hydrated—dehydration can affect semen volume.
• Eat antioxidant-rich foods: berries, nuts, leafy greens.
• Exercise regularly but avoid excessive endurance sports.
• Limit exposure to environmental toxins: use gloves when handling chemicals.
• Practice safe sex to reduce infection risk.

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When to See a Doctor

Speak with a healthcare provider if you experience:

• Inability to conceive after 12 months of regular, unprotected intercourse (or 6 months if you're over 35)
• Pain, swelling or a palpable lump in the testicles or scrotum
• Erectile dysfunction or decreased libido
• Signs of hormonal imbalance (fatigue, mood changes, muscle loss)

Always seek immediate medical attention for testicular pain, significant swelling or any potentially life-threatening symptoms.

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Key Takeaways

• Low sperm count affects fertility but often responds well to treatment.
• A thorough workup includes history, physical exam, semen analysis, hormone testing and imaging.
• Address lifestyle factors, consider supplements and follow targeted medical or surgical therapies.
• Assisted reproductive technologies offer solutions when other approaches aren't enough.
• If you're experiencing symptoms like fatigue, decreased libido or mood changes alongside fertility concerns, use Ubie's free Low Testosterone / Late Onset Hypogonadism symptom checker to better understand whether hormonal issues may be contributing to your condition.
• Always speak to a doctor about symptoms that worry you or could be serious.

By taking proactive steps—both medically and in daily life—many men with low sperm counts go on to father healthy children. Don't hesitate to consult your healthcare provider to develop the right plan for you.