You went and got the test done. Sat in that awkward little room at the lab, produced the sample, tried not to overthink it, and now you’re holding a report full of numbers and medical terms that might as well be in a different language.
You’re looking at the results and you see things like “progressive motility 28%” or “morphology 3%” or “count 12 million/mL” and you have no idea whether that’s good, bad, or something to panic about.
Let’s go through every parameter on a standard semen analysis report, explain what it means, and — most importantly — what abnormal numbers actually signify. Because one of the biggest mistakes men make is seeing one low number and concluding they’re infertile. It’s rarely that simple.
How the test works
Before we get to the numbers, a quick note on how the sample is collected and why it matters for your results.
Abstinence period: You’re asked to avoid ejaculation for 2-5 days before the test. Too short (less than 2 days) and your count will be low because the reserves haven’t replenished. Too long (more than 7 days) and motility drops because older sperm start dying in the tract. The 2-5 day window gives the most representative sample.
Collection method: Masturbation into a sterile container provided by the lab. Some labs have a private room; others allow home collection if you can deliver the sample within 30-60 minutes at body temperature (keep it in your shirt pocket, not in a bag — body heat matters).
What to avoid before the test: Alcohol, fever, hot baths, and intense physical stress in the 2-3 days before testing can all affect results. If you’ve been ill with a fever in the past 2-3 months, mention it — fever can impair sperm production for up to 90 days.
Important: Collect the entire sample. If you spill any — especially the first portion, which is typically the most sperm-rich — tell the lab. An incomplete sample gives unreliable results.
The parameters, one by one
Here’s what your report will show, what the WHO 2021 reference values are, and what each parameter means in plain language.
Volume
What it measures: The total amount of semen per ejaculation, in millilitres.
WHO 2021 reference: 1.4 mL or more (5th percentile). Most men produce 1.5-5 mL.
What it means: Semen volume comes from the seminal vesicles (about 65-70%), the prostate (about 20-30%), and smaller contributions from other glands. Sperm themselves are a tiny fraction of the total volume.
If it’s low (below 1.4 mL):
- Incomplete collection (most common reason)
- Short abstinence period
- Retrograde ejaculation (semen going backward into the bladder)
- Ejaculatory duct obstruction
- Low testosterone
- Absence or underdevelopment of seminal vesicles
If it’s very high (above 6 mL): Usually not a problem. Can sometimes be associated with infection or inflammation.
Sperm concentration (count)
What it measures: The number of sperm per millilitre of semen.
WHO 2021 reference: 16 million per mL or more (5th percentile).
Total sperm count (concentration x volume) should be 39 million or more per ejaculate.
What it means: This tells you how many sperm are being produced and making it into the ejaculate. The testes produce roughly 1,000-1,500 sperm per second, constantly. But sperm take about 74 days to fully develop, so anything that affected you 2-3 months ago can show up in today’s count.
If it’s low (oligozoospermia):
- Mild: 10-16 million/mL
- Moderate: 5-10 million/mL
- Severe: less than 5 million/mL
If it’s zero (azoospermia): This needs immediate investigation. It could be obstructive (sperm are being made but can’t get out) or non-obstructive (the testes aren’t producing sperm). The distinction matters enormously for treatment options.
Common causes of low count: Varicocele, hormonal imbalances, heat exposure, lifestyle factors (obesity, smoking, alcohol), medications, genetic causes, past infections, undescended testes.
Motility
What it measures: How well the sperm move. Reported in two ways:
- Total motility: Percentage of sperm that are moving at all. WHO 2021 reference: 42% or more.
- Progressive motility: Percentage of sperm that are actively swimming forward (not just twitching in place). WHO 2021 reference: 30% or more.
What it means: Sperm need to swim through the cervix, uterus, and fallopian tubes to reach the egg. That’s a significant journey at their scale. Non-motile sperm can’t make that trip. Progressive motility — forward movement — is what matters for natural conception.
If it’s low (asthenozoospermia):
- Could indicate: varicocele, oxidative stress, infection, anti-sperm antibodies, prolonged abstinence (old sperm lose motility), exposure to toxins or heat
- Important: motility is one of the parameters most affected by sample handling. If the sample got cold during transport or wasn’t analysed within an hour, motility will be artificially low.
Morphology
What it measures: The percentage of sperm with normal shape (head, midpiece, and tail all properly formed).
WHO 2021 reference (strict/Tygerberg criteria, also called Kruger strict criteria): 4% normal forms or more.
This is the number that panics men the most, because 4% sounds terrifyingly low. “Only 4% of my sperm are normal?!”
What it means: Strict morphology criteria (also called Kruger criteria) are intentionally harsh. They’re looking at every detail — head shape, head size, acrosome proportion, midpiece width, tail length. Minor deviations that probably don’t matter functionally still get classified as “abnormal.” In reality, men with 3-4% normal morphology conceive naturally all the time.
If it’s low (teratozoospermia):
- Below 4%: Mildly concerning. May benefit from lifestyle modification, antioxidants, or time.
- Below 1%: More significant. Warrants investigation and may affect treatment decisions (ICSI may be preferred over IUI).
- 0% normal forms: Very rare. Double-check the lab’s methodology.
Important context: Morphology is the most subjective and variable parameter in semen analysis. Different labs, different technicians, and even different microscopes can give different morphology percentages for the same sample. A single low morphology reading is the least reliable indicator of infertility among all semen parameters.
pH
What it measures: Acidity/alkalinity of the semen.
WHO 2021 reference: 7.2 or higher (slightly alkaline).
If it’s abnormal: Low pH (acidic) can suggest ejaculatory duct obstruction or absence of seminal vesicles (the seminal vesicles produce the alkaline component). This is a secondary finding — pH alone doesn’t diagnose anything, but combined with low volume and absent fructose, it points toward specific conditions.
Liquefaction time
What it measures: How long it takes for the semen to change from a gel-like consistency to liquid after ejaculation.
Normal: Complete liquefaction within 15-30 minutes, up to 60 minutes.
If it takes too long: Delayed liquefaction can be associated with prostate issues or infection. Some labs note “incomplete liquefaction.” If this is the only abnormality, it’s usually not clinically significant.
White blood cells (round cells)
What it measures: The presence of white blood cells in the semen.
WHO 2021 reference: Less than 1 million per mL.
If it’s elevated (leukocytospermia): Suggests infection or inflammation in the reproductive tract (prostatitis, epididymitis, urethritis). May require a semen culture and antibiotic treatment. Elevated WBCs produce reactive oxygen species (ROS) that damage sperm DNA and reduce motility.
Vitality
What it measures: The percentage of live sperm (some labs skip this if motility is normal).
WHO 2021 reference: 54% or more live sperm.
When it matters: Mainly useful when motility is very low — it helps distinguish between dead sperm (necrozoospermia) and live-but-immotile sperm, which have different causes and treatment implications.
Putting it all together
Here’s the key insight most reports won’t give you: no single parameter determines fertility. Fertility is a probability game, and semen analysis gives you the odds.
A man with a slightly low count but excellent motility may conceive easily. A man with perfect count but terrible motility may struggle. A man with below-reference morphology but everything else stellar is probably fine.
The WHO reference values represent the 5th percentile of men who achieved natural conception within 12 months. That means 5% of men who naturally fathered children had values at or below these cutoffs. They’re not hard lines between “fertile” and “infertile” — they’re statistical benchmarks.
What “abnormal” results mean
If one or more parameters are below reference, here’s the reality:
It doesn’t mean you can’t have children. Many men with below-reference values conceive naturally. It may take longer, or it may benefit from treatment, but abnormal semen parameters do not equal a zero-percent chance.
One bad test isn’t a diagnosis. Sperm production takes about 74 days. A fever you had two months ago, a stressful period, a medication you took, a particularly hot summer — all of these can temporarily tank your numbers. Retesting after 2-3 months is standard practice.
The trend matters more than a single number. Two tests showing consistently low count is more meaningful than one low and one normal.
Female partner factors interact. A mild male factor combined with normal female fertility may not be a problem. The same mild male factor combined with a female factor (age, ovulatory issues, tubal problems) may tip the balance. Fertility is always a couple’s equation.
What to do next
If everything is normal: Great. The semen analysis is cleared. If you’re still not conceiving, the focus shifts to your partner’s evaluation (if not already done) and timing of intercourse. Make sure you’re having sex during the fertile window — typically 5 days before ovulation through the day of ovulation.
If results are mildly abnormal: Retest in 2-3 months. In the meantime, focus on lifestyle: maintain a healthy weight, quit smoking, limit alcohol, avoid excessive heat to the groin, manage stress, sleep well. Consider a basic antioxidant supplement (vitamin C, vitamin E, zinc, selenium, CoQ10) — there’s moderate evidence these can improve parameters modestly.
If results are significantly abnormal: Retest to confirm, and see a fertility specialist (reproductive urologist or andrologist). They’ll do a physical exam, blood work (hormones), and possibly imaging to identify the cause. Treatment depends on what they find.
If sperm count is zero (azoospermia): Don’t despair, but do see a specialist promptly. Obstructive azoospermia (where sperm are being made but can’t get out) has excellent treatment outcomes — sperm can be retrieved surgically and used with IVF/ICSI.
When to see a doctor
See a fertility specialist if:
- Two semen analyses (done 2-3 months apart) show consistently below-reference parameters
- Your sperm count is zero or extremely low (below 5 million/mL)
- You have additional symptoms: testicular pain, swelling, lumps, or a history of undescended testes, testicular injury, or infections
- You’ve been trying to conceive for over 12 months (6 months if your partner is over 35)
- Your report shows elevated white blood cells, suggesting possible infection
If you’re dealing with a broader picture of infertility concerns, our guide to male infertility in India covers causes, emotional impact, and treatment options in detail.
A semen analysis is just a starting point — a screening tool. It tells you whether there’s something to investigate further. Whatever the numbers say, they’re data, not a verdict. And data is always better than not knowing.