Oligospermia (Low Sperm Count)

What is oligospermia?

The World Health Organization's current (2021) reference defines a low sperm concentration as fewer than 16 million sperm per millilitre of semen, or fewer than 39 million in the whole sample. Older reports and websites often quote 20 million per millilitre; that figure is out of date. Oligospermia usually causes no symptoms and is found when a couple is investigated for infertility. A male factor contributes in about half of couples who have trouble conceiving, so both partners should be tested together — not just the woman, as often happens.

Understanding a semen report

These are the values of the lowest 5% of men who fathered a child within a year — not a pass/fail line. Men below them can still conceive, and men above them can have fertility problems. Sperm counts vary a lot from one sample to the next, so one abnormal result should be repeated, usually about 3 months later, after 2–7 days without ejaculation.

Causes

• Anabolic steroids and testosterone — including many gym and “body-building” supplements. They switch off the body's own sperm production, sometimes for many months. Testosterone is not a fertility treatment for men.
• Heat: tight underwear, hot baths or saunas, laptops on the lap, long hours of sitting or driving, and hot workplaces
• Varicocele — enlarged veins above the testicle, usually on the left
• Infections: mumps affecting the testicles, sexually transmitted infections, prostate infections
• Hormonal problems: pituitary disorders, high prolactin, thyroid disease
• Testicular causes: undescended testes in childhood, injury, torsion, genetic conditions (such as Klinefelter syndrome)
• Lifestyle: smoking, heavy alcohol use, cannabis, obesity, poorly controlled diabetes, severe stress
• Medicines and treatments: chemotherapy, radiotherapy, and some long-term medicines

Why changes take 3 months

Assessment & treatment

A doctor (urologist, andrologist or fertility specialist) will take a history, examine the testicles, and may order hormone tests (FSH, LH, testosterone, prolactin, thyroid), an ultrasound, and — for very low counts — genetic tests. Treatment depends on the cause:

• Stopping steroids, reducing heat exposure and correcting lifestyle factors
• Treating infections, and hormone treatment when a pituitary problem is found
• Varicocele repair in selected men with a clinical varicocele and abnormal semen
• Assisted reproduction: intrauterine insemination (IUI), or IVF with ICSI, in which a single sperm is injected into each egg — this can work even with very low counts

The female partner's age and fertility matter too; after 35, don't delay assessment.

Ayurvedic view

Ayurveda describes reduced quantity and quality of semen as Shukra kshaya or Alpa shukra, and lists eight types of Shukra dushti (disorders of semen). Shukra is the last of the seven tissues to be formed, so poor digestion, under-nutrition, overexertion, excessive heat, alcohol, stress and grief are all seen as causes. This is distinct from Klaibya (erectile problems) — low sperm count does not mean impotence. Vajikarana therapy uses nourishing food, rest, a loving relationship and specific herbs, often after a cleansing course.

Herbs & safety

• Ashwagandha — small clinical trials in infertile men reported improved sperm count and motility
• Kapikacchu (Mucuna pruriens) — used classically for Shukra; contains levodopa, so avoid with Parkinson's medicines
• Shatavari, Gokshura and Safed Musli — traditional Vajikarana herbs with limited evidence

Evidence is encouraging but limited, and trials are small. Many “fertility” or “stamina” products sold online have been found to contain hidden steroids or heavy metals — both of which lower sperm counts. Use only licensed products with full labelling, prescribed by a qualified practitioner, and tell your fertility doctor what you take.

What helps

• Timing: when trying to conceive, have sex every 2–3 days throughout the cycle. Long gaps between ejaculations do not improve fertility — sperm quality falls with long abstinence.
• Stop smoking, cannabis and anabolic steroids; keep alcohol low.
• Reach and keep a healthy weight; exercise regularly but moderately.
• Keep the testicles cool: loose cotton underwear, no laptops on the lap, breaks from long sitting, avoid hot tubs.
• Eat a balanced diet rich in vegetables, fruit, nuts, seeds, whole grains, pulses and fish if you eat it. Ayurveda recommends milk, ghee, dates, almonds and soaked black gram (urad) in moderation.
• Sleep 7–8 hours and manage stress — infertility itself is stressful for both partners; counselling helps.

When to see a doctor

• No pregnancy after 12 months of regular unprotected sex — or after 6 months if the woman is 35 or older
• A history of undescended testes, testicular injury or surgery, mumps affecting the testicles, or chemotherapy
• A lump, swelling or heaviness in the testicle — see a doctor promptly
• Sudden, severe testicular pain — go to an emergency department immediately (possible torsion)
• Reduced facial or body hair, breast enlargement or low sex drive, which suggest a hormone problem

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Clinical sources & further reading

Reviewed against the WHO laboratory manual for the examination and processing of human semen (6th edition, 2021), NHS: Low sperm count, NHS: Infertility, NCCIH: Ayurvedic Medicine, and Ministry of Ayush pharmacovigilance. These links support education and do not replace individual medical advice.