Low Sperm Count and Poor Motility: How to Read Your Semen Report, What Causes It and How It Is Treated

Can a low sperm count or poor motility report get better?

Very often, yes. Sperm production (spermatogenesis) is a continuous process, and a new batch of sperm takes about 72 to 90 days to develop and mature. That is why a semen report reflects what happened to your body over the last three months, and why a repeat test makes sense only after about three months of treatment or lifestyle change.

When a couple is trying for a child and the husband's report shows a low count or slow sperm, the first question is usually: "Is this report permanent? Can medicines bring it back to normal?" The honest answer is that it depends on the cause. If a treatable cause such as a varicocele, a hormonal problem, an infection or heavy heat exposure is found and corrected, many men see a clear improvement within one or two sperm cycles. Some men need assisted options such as IUI or IVF/ICSI, and that is also a good outcome, not a failure.

Remember that male factors contribute to roughly half of all couples' fertility difficulties, so a semen analysis is one of the first tests for any couple who have been trying for a year without success.

What are the normal semen analysis values (WHO reference limits)?

The World Health Organization publishes lower reference limits for semen parameters. The values below are from the WHO Laboratory Manual, 6th edition (2021). A value below the limit does not mean you are infertile, and a value above it does not guarantee conception; it is a guide for your doctor.

What do oligozoospermia, asthenozoospermia and teratozoospermia mean?

These are the labels used on a semen report to describe which part of sperm quality is below the reference limit.

• Oligozoospermia (often written oligospermia): sperm concentration below 16 million per mL.
• Azoospermia: no sperm at all in the ejaculate. It can be obstructive (a blockage) or non-obstructive (production problem), and the two are treated very differently.
• Asthenozoospermia: reduced motility, meaning too few sperm are moving, or moving forward well enough. Slow sperm struggle to reach the egg.
• Teratozoospermia: a high share of sperm with abnormal head, neck or tail shape. Note that the normal-forms limit is only 4%, so most sperm in every man look abnormal under the microscope.
• Necrozoospermia: a large share of dead sperm.

What causes low sperm count and poor motility?

In most men, more than one factor is involved. Doctors look for a medical cause first, then for lifestyle and environmental contributors. A common chain of events is:

1. Testicular heat, varicocele or hormonal imbalance
2. Oxidative stress in the testes
3. Sperm DNA damage
4. Low count and poor motility

• Varicocele: swelling of the veins around the testicle. It raises scrotal temperature and can damage sperm. It is found in a large share of men who are evaluated for infertility, and it is one of the few causes that can be corrected with surgery.
• Hormonal problems: low FSH and LH from the pituitary gland, or an imbalance in testosterone, prolactin or thyroid hormones, reduce sperm production. Our guide on low testosterone explains how these tests work.
• Oxidative stress: heavy smoking, alcohol, obesity, a poor diet and pollution produce free radicals that damage sperm and raise the sperm DNA fragmentation index.
• Infections and past illness: chronic prostatitis, epididymitis, sexually transmitted infections or mumps in adulthood.
• Medicines and hormones: testosterone replacement therapy and anabolic steroids switch off sperm production (see the warning below).
• Genetic and developmental causes: undescended testicle in childhood, or chromosomal conditions, which a specialist can test for.

How should I give a semen sample so the report is accurate?

Collect the sample correctly, because a badly collected sample can make a normal man look abnormal. Follow these rules:

1. Abstinence: avoid ejaculation for 2 to 7 days before the test (most labs ask for 3 to 5 days). Less than 2 days can lower the count and volume; a very long gap can lower motility.
2. Collection method: collect the whole sample by masturbation into the sterile container the lab gives you. Do not use a normal condom or withdrawal, and do not lose any part of the first portion.
3. Timing: keep the sample at body temperature and deliver it to the lab within 30 to 60 minutes. Do not put it in the fridge.
4. Tell the lab about fever, illness or new medicines: a fever in the previous three months can temporarily lower sperm quality.
5. Repeat the test: if the first report is abnormal, a second sample after a few weeks is usually requested.

How is low sperm count treated?

Treatment depends on what the evaluation finds. The doctor usually combines a clinical examination, scrotal ultrasound if needed, and blood tests for FSH, LH, testosterone and sometimes prolactin and thyroid hormones. Treatment is not the same for every man.

Treating the cause

• Varicocele: if it is clinically significant and the semen report is abnormal, microscopic varicocelectomy (a surgical repair) can improve sperm parameters in many men within three to six months.
• Infection: prostatitis, epididymitis or a urinary or genital infection is treated with the right antibiotic after testing.
• Medicines that harm sperm: your doctor will review anything you take, including anabolic steroids, and stop or change what is not essential.

Hormonal treatment (specialist-supervised)

In men with low FSH and LH, doctors may use hormone-modulating medicines. Clomiphene citrate or tamoxifen, which raise the pituitary signals to the testes, are used off-label for male infertility, meaning they are not officially approved for this purpose. They should only be taken under specialist supervision with blood tests and follow-up semen analysis. The evidence is better for some men than others, and results vary.

Antioxidants and supplements (modest, mixed evidence)

Coenzyme Q10, L-carnitine, zinc, selenium, lycopene and N-acetyl cysteine (NAC) are supplements, not proven drugs for infertility. Some studies, mainly small ones, show modest improvement in motility or count; others show no clear benefit, and it is not certain that they increase live births. A doctor may suggest a combination for three months alongside treatment of the cause, but they do not replace a diagnosis. Avoid very high doses of zinc and unverified products.

Herbal powders and "fertility boosters" have the same problem, with an added one: quality varies and some products contain heavy metals or hidden drugs. For more on this, see our article on Shilajit and herbal supplements.

When there is no sperm in the semen (azoospermia)

In obstructive azoospermia, a blockage can sometimes be repaired surgically. In non-obstructive azoospermia, sperm can often still be retrieved from the testicle by micro-TESE and used for IVF/ICSI. A urologist or andrologist should plan this.

Do heat and lifestyle affect sperm quality?

Yes. The testes sit outside the body because sperm production works best at about 2 to 4 °C below core body temperature, which is around 37 °C. Anything that keeps the scrotum warm for long hours can lower quality.

• Avoid keeping a laptop on your lap for long periods.
• Wear loose cotton boxers instead of tight synthetic underwear, so air can circulate.
• Limit hot baths, saunas and hot tubs while you are trying for a child.
• Avoid long unbroken sitting, such as long drives or desk work without breaks.
• Stop smoking and cut down alcohol. Both are linked with lower count and motility.
• Keep a healthy weight, and sleep well. Poor sleep, obesity and constant stress affect hormones.
• Avoid anabolic steroids and unregulated supplements from the gym.

Sexual health problems also affect conception. If erections or ejaculation are a concern, read our complete guide to erectile dysfunction, because timing intercourse is much harder when ED or premature ejaculation is present.

What is the usual step-by-step plan?

A typical pathway, which your doctor adjusts for you, looks like this:

1. Correct semen analysis (repeat if abnormal)
2. Find the cause: examination, hormones, ultrasound
3. About 90 days of cause-based treatment and lifestyle changes
4. Repeat semen analysis and review

If there is no improvement after a full cycle, or the report is very low or shows no sperm, the doctor may refer you to a fertility specialist early rather than waiting. Women's age also matters, so the couple should be assessed together.