Borderline Semen Analysis: What Counts as ‘Borderline’?

Borderline Semen Analysis: What Counts as ‘Borderline’? If you’ve been told your semen analysis is “a little low,” “not terrible,” or “borderline,” you’re in good company. This is one of the most common situations I see—and it’s also one of the most confusing, because it lives in the gray zone between “normal” and “clearly abnormal.”

Here’s the deal: a semen analysis is a snapshot of one moment in time. Borderline results often mean “there might be something worth improving or checking,” not “you can’t get pregnant.”

This guide will help you understand what “borderline” usually refers to, why results bounce around, what’s actually worth changing, and when it’s time to bring in a specialist.

Quick takeaways

“Borderline” usually means one or two semen parameters are near the lower reference range—not that you’re infertile.
Numbers naturally vary from week to week based on illness, stress, abstinence time, and collection issues.
Repeat testing is standard; most clinicians want 2 (sometimes 3) semen analyses before making big conclusions.
Look at the pattern (count, motility, morphology, volume, concentration, total motile sperm count) rather than fixating on one number.
Total motile sperm count (TMSC) often predicts “how usable” the sample is better than concentration alone.
Borderline results are a good reason to optimize basics (heat, sleep, alcohol, nicotine/cannabis, medications, timing), because many factors are modifiable.
Don’t ignore symptoms like testicular pain, a new lump, very low libido, or trouble ejaculating—those deserve a clinician sooner.

What this diagnosis/pattern means (in plain English)

“Borderline” is not an official diagnosis. It’s a shorthand way of saying: your semen analysis is close to the lower end of the reference ranges, or one parameter is slightly below while others look okay.

Reference ranges (like those published by the World Health Organization) are not a magic line between “fertile” and “infertile.” They’re based on populations and probabilities. That means some men with “normal” results still struggle, and plenty of men with “borderline” results conceive without assistance.

What I tell patients: borderline results often mean your “margin for error” is smaller. If timing is off, or there’s an additional factor (female partner age, ovulation issues, tubal factors), the journey can take longer.

Also important: semen parameters don’t exist in isolation. A sample with slightly low concentration can still have a solid total motile sperm count if the volume is good and motility is decent. And the reverse can happen: “normal” concentration with low motility may still translate to fewer moving sperm overall.

Which numbers are people usually talking about?

When someone says “borderline semen analysis,” they’re usually referencing one of these:

Concentration (sperm per mL) slightly below the lab’s reference range
Total sperm count (concentration × volume) near the low end
Motility (especially progressive motility) a bit low
Morphology (strict criteria) low or “borderline low”
Volume slightly low (which can lower total count even if concentration is fine)
Total motile sperm count (TMSC) in an in-between zone

What “borderline” often looks like (and how to interpret it)

Different labs use slightly different cutoffs, and the WHO reference values have been updated over time. So instead of obsessing over a single “perfect” threshold, it helps to think in patterns and practical implications.

Finding/term you might see	What it suggests (most common meaning)	What to do next
“Borderline low concentration”	May reflect natural variability, timing/collection factors, or mild testicular sperm production issues	Repeat semen analysis with consistent abstinence window; review heat/exposures/meds; consider exam for varicocele if persistent
“Borderline motility” or “progressive motility low”	Can be affected by time to analysis, fever/illness, oxidative stress, smoking/cannabis, varicocele	Repeat test (ideally same lab); check collection/transport; consider lifestyle changes and clinician evaluation if ongoing
“Borderline morphology”	Very common; can fluctuate; may matter more when it’s very low or paired with low count/motility	Don’t panic; repeat test; focus on overall TMSC and trends; discuss next steps if multiple parameters are affected
Low volume (especially <1.5 mL) with otherwise okay numbers	Could be incomplete collection, short abstinence, dehydration, retrograde ejaculation, or duct/ejaculatory issues	Confirm collection completeness; repeat; consider clinician evaluation if recurrent or if volume is very low
High round cells / “possible WBCs”	May signal inflammation; sometimes a lab misread (immature sperm can mimic WBCs)	Ask if reflex testing for true white blood cells was done; discuss with clinician if persistent or symptomatic
Borderline Total Motile Sperm Count (TMSC)	“In-between” functional sperm number; can influence whether timed intercourse/IUI/IVF is more efficient	Repeat to confirm; optimize basics for 8–12 weeks; discuss fertility plan as a couple
Big change vs prior test	Often timing, abstinence, illness, collection, lab differences—or a real new issue	Look for explanations (fever, new meds, hot tub, stress); repeat with standardized conditions

What it doesn’t automatically mean

Borderline does not automatically mean:

You’ll need IVF
You have permanent infertility
You did something “wrong”
Your testosterone is low (sometimes it is, often it isn’t)
There’s a serious medical problem (occasionally there is, which is why we evaluate thoughtfully)

It does mean it’s worth being a bit more intentional: repeat the test correctly, look for fixable factors, and make decisions based on trends and the bigger fertility picture.

Why repeat testing is common

Sperm production is a process that takes about 2–3 months from start to finish. A semen analysis today reflects what was happening in the testicles weeks ago—not just what you did yesterday.

On top of that, semen analysis numbers bounce around more than most people expect. Even in healthy men, concentration and motility can vary meaningfully between samples.

Common reasons the first test looks “borderline,” and the second looks different:

Abstinence window changes (2 days vs 6 days can shift volume and concentration)
Recent fever/flu/COVID (often temporarily worsens parameters)
Collection issues (missing the first part of the sample is a big deal)
Time to analysis (delays can reduce motility)
Different lab methods (some labs are simply more consistent than others)
Stress, sleep, travel, alcohol (not always, but sometimes)

In many cases, repeating a semen analysis 2–4 weeks later (with consistent prep) clarifies whether you’re seeing random noise or a real pattern.

What usually causes this (the short list)

Borderline results usually come from one of four buckets. Sometimes it’s more than one.

1) Timing, collection, and natural variability

Abstinence too short or too long
Part of the sample missed
Lubricants that aren’t sperm-friendly
Delayed delivery to the lab or temperature extremes during transport
Recent fever or systemic illness

2) Lifestyle and exposures (often fixable)

Heat exposure (hot tubs/saunas, laptop on lap, heated car seats, tight compression for long periods)
Nicotine (including vaping), heavy alcohol, cannabis use
Sleep debt and chronic stress
Obesity and metabolic health issues
Intense endurance training without recovery (in some men)
Certain workplace exposures (solvents, pesticides, heavy metals)

3) Medical/anatomy factors

Varicocele (enlarged veins around the testicle; one of the most common treatable findings)
History of undescended testicle, torsion, significant trauma
Infections/inflammation (not always symptomatic)
Ejaculatory duct issues (more suggested by very low volume, low pH, or absent fructose—depending on the lab’s testing)

4) Hormones and medications

Low FSH/LH signaling (less common, but important when present)
High prolactin, thyroid issues (occasionally)
Testosterone therapy (TRT) can markedly lower sperm production
Some medications can affect ejaculation, erection, or semen volume

5) Genetics (usually when results are more than borderline)

Genetic causes are typically considered when sperm counts are very low, absent, or when there are other clues in the history/exam. Borderline results alone don’t automatically point to genetics, but persistent abnormalities may warrant a deeper look.

How doctors typically evaluate it

A good evaluation is usually straightforward and not dramatic. It’s aimed at answering two questions: (1) Is this a real, persistent pattern? (2) Is there a treatable cause we shouldn’t miss?

1) A careful history (the most underrated part)

How long you’ve been trying and timing frequency
Prior pregnancies (with any partner)
Recent fever/illness in the last 2–3 months
Heat exposures, hot tubs/saunas, endurance training
Nicotine/cannabis/alcohol
Prescription meds and supplements (including testosterone, finasteride, SSRIs, etc.)
Puberty timing, testicular history (undescended testicle, torsion, mumps orchitis)
Sexual function (erections, ejaculation, libido)

2) Physical exam

This is where a clinician checks testicular size/consistency, looks for a varicocele, and makes sure there aren’t red flags like a mass. It’s quick, and it often changes the plan.

3) Repeat semen analysis (often 2 total)

Most clinicians will want a repeat test with standardized conditions. If the second test is clearly normal, that’s reassuring. If the pattern persists, you’ve got a clearer signal.

4) Basic labs (when appropriate)

If counts are consistently low-ish or symptoms suggest a hormone issue, labs may include:

FSH, LH
Total testosterone (sometimes with free testosterone)
Estradiol
Prolactin
TSH (thyroid)

5) Imaging or additional tests (selectively)

Scrotal ultrasound (sometimes, especially if exam is limited or varicocele is unclear)
Testing for true white blood cells if “round cells” are elevated
DNA fragmentation testing in select scenarios (for example, recurrent pregnancy loss, repeated IVF failure, or persistent unexplained borderline parameters)
Genetic testing when sperm counts are very low or there are strong indicators

What you can do this week

Borderline results respond best to boring, high-return moves. Think “reduce friction” and “remove obvious sperm stressors.”

This-week checklist (simple, high ROI)

☐ Pick a repeat test date (often 2–4 weeks out) and plan to keep conditions consistent.
☐ Standardize abstinence: aim for 2–5 days before the next sample (whatever your clinic recommends—then stick to it).
☐ Cut heat exposure: no hot tubs/saunas; avoid laptop-on-lap; keep workouts sensible.
☐ Pause nicotine and cannabis if you can; if you can’t, reduce and make a plan.
☐ Alcohol: keep it modest (think “occasional” rather than “daily”).
☐ Prioritize sleep: target a consistent schedule; sleep debt shows up in hormones and recovery.
☐ Review meds and supplements you’re taking and bring the list to your clinician—especially testosterone or “T-boosters.”
☐ Use sperm-friendly lubricant (or none), especially if dryness is an issue.

If you want one mindset shift: you’re not trying to “hack” sperm in 48 hours. You’re trying to set up the next 8–12 weeks so your next sample reflects healthier spermatogenesis.

When to see a clinician sooner (red flags)

Borderline numbers alone rarely represent an emergency. But these situations are worth prompt medical attention:

A new testicular lump, firmness, or testicle that’s changing size
Significant testicular pain or swelling (especially sudden onset)
Very low semen volume repeatedly, especially if it’s close to “almost none”
Blood in semen that persists or recurs
Symptoms of very low testosterone (marked low libido, low energy) or history suggesting pituitary issues (headaches/vision changes)
History of undescended testicle or prior testicular cancer
On testosterone therapy and actively trying for pregnancy (this deserves a clinician-guided plan)

What to do next

Step 1: Get the full report and read it like a pattern, not a verdict.
Ask for the complete semen analysis (not just “normal/borderline”). Note volume, concentration, total count, motility (especially progressive), morphology, and any comments about viscosity, agglutination, or round cells.
Step 2: Calculate (or ask for) TMSC.
Total motile sperm count roughly reflects how many moving sperm are available. It helps frame next steps in a more real-world way than any single parameter.
Step 3: Repeat the semen analysis under consistent conditions.
Use the same abstinence window, collect the entire sample, and follow the lab’s timing/temperature instructions. If you can, use the same lab for comparability.
Step 4: Do an honest “exposure audit” and fix the obvious stuff.
Heat, nicotine/cannabis, heavy alcohol, poor sleep, and high stress are common drivers of borderline results. You don’t need perfection—just fewer hits to sperm quality.
Step 5: If abnormalities persist, get a focused male-factor evaluation.
A urologist (often a reproductive urologist) can check for varicocele, discuss labs, and make sure there isn’t a correctable anatomic or hormonal issue.
Step 6: Make a couple-based plan with timelines.
Borderline male factors matter more (or less) depending on partner age, ovulation timing, tubal health, and how long you’ve been trying. Set a reasonable reassessment point—often 8–12 weeks after changes or a treatment decision if time is tight.

Common myths

Myth: “Borderline means we need IVF.”
Reality: Borderline results often call for repeat testing and optimization first. Treatment choices depend on the whole fertility picture and trends over time.

Myth: “If one parameter is low, everything is doomed.”
Reality: Many pregnancies happen with one mildly abnormal parameter. The combined picture (especially TMSC) is usually more informative.

Myth: “Morphology is the only thing that matters.”
Reality: Morphology can be helpful, but it’s also variable and lab-dependent. Count and motility (and the overall pattern) often drive decisions more.

Myth: “I’ll fix this in a week with a supplement.”
Reality: Sperm development takes weeks to months. If something helps, you typically see it on a semen analysis after ~8–12 weeks of consistent changes.

Myth: “Testosterone will improve sperm.”
Reality: External testosterone commonly suppresses sperm production. If you’re trying to conceive, this is a clinician conversation, not a DIY move.

SWMR tools that can help

If your numbers are borderline, the goal is usually to support sperm production and reduce avoidable stressors for the next 2–3 months. That’s the window where lifestyle and nutrition changes are most likely to show up on repeat testing.

Some men also like having a simple daily routine so they’re not constantly wondering if they’re “doing enough.” If you’re considering a supplement, choose one that’s transparent about ingredients and designed around male fertility rather than vague “test booster” marketing.

SWMR offers SWMR fertility supplements as an option to pair with the fundamentals (sleep, exercise, heat reduction, and avoiding nicotine/cannabis). Bring any supplement you’re taking to your clinician so it fits your overall plan and medical history.

FAQs

What counts as a “borderline” semen analysis?
Usually it means one or two parameters (concentration, motility, morphology, or volume) are near the lab’s lower reference range or slightly below it. It’s not a formal diagnosis, and it should trigger “repeat and contextualize,” not panic.

Do borderline results mean I’m infertile?
Not necessarily. Many men with borderline parameters conceive naturally. Borderline results may mean it takes longer, timing matters more, or that additional factors (like partner age or ovulation issues) have a bigger impact.

How many semen analyses do I need?
Commonly two tests, sometimes three if results are inconsistent or if the first was clearly affected by illness or collection issues. Trends are more reliable than a single snapshot.

How long should I wait before repeating the test?
If the test seems “off” due to collection or abstinence issues, repeating in 2–4 weeks is reasonable. If you’re making lifestyle changes, many clinicians recheck around 8–12 weeks to reflect a full cycle of sperm development.

What abstinence period is best before a semen analysis?
Most labs recommend 2–5 days. The key is consistency between tests. A longer abstinence window can increase count but sometimes reduce motility; a very short window can reduce count. Follow your lab’s instructions.

My morphology is low but everything else is okay. Is that borderline?
It can be. Isolated low morphology is common and may not be decisive on its own. If count and motility are strong and the total motile sperm count is good, the practical impact may be limited. A repeat test helps confirm whether it’s persistent.

What’s more important: concentration or total motile sperm count (TMSC)?
TMSC often tracks real-world chances better because it incorporates volume and motility. Concentration can look “borderline” while TMSC is adequate (or vice versa). If you’re trying to decide what a result means, TMSC is a useful anchor.

Could a fever or COVID really cause borderline results?
Yes. Febrile illness can temporarily lower sperm count and motility, sometimes for weeks. If you had a significant fever in the prior 2–3 months, it’s a strong reason to repeat the test rather than assume the result is your baseline.

When should I worry about low semen volume?
One low-volume sample can be simple (missed collection, short abstinence, dehydration). Repeated low volume—especially very low volume—deserves evaluation to rule out retrograde ejaculation, obstruction/ejaculatory duct issues, or other causes.

Does a varicocele cause borderline semen analysis results?
It can. Varicoceles are common and can be associated with lower motility, lower count, and higher DNA fragmentation in some men. A physical exam is often the first step; ultrasound may be used selectively.

Should I get DNA fragmentation testing if my results are borderline?
Sometimes, but not always. It may be more useful if you have persistent unexplained borderline parameters, recurrent pregnancy loss, or repeated assisted reproduction failure. It’s a conversation to have once the basics (repeat SA, exam, and reversible factors) are addressed. [*1]

Do supplements help borderline semen analysis results?
Some men see improvements, especially when a deficiency or oxidative stress is part of the picture, but results vary. Supplements are not a substitute for fixing heat exposure, nicotine/cannabis, heavy alcohol, poor sleep, or untreated medical issues. If you use supplements, give it time (often 8–12 weeks) and re-test. [*2]

When is it time to see a reproductive urologist?
If you’ve had two semen analyses showing persistent abnormalities, if you have symptoms (pain, very low volume, sexual/ejaculatory issues), if there’s a known risk factor (undescended testicle, prior chemo, testosterone use), or if time is tight due to partner age—those are all good reasons to get a specialist involved.

References

World Health Organization. WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th ed. (2021).
American Urological Association (AUA) / American Society for Reproductive Medicine (ASRM). Diagnosis and Treatment of Infertility in Men: Guideline (updated periodically).
European Association of Urology (EAU). Guidelines on Sexual and Reproductive Health (Male infertility section; updated periodically).
Practice Committee of the American Society for Reproductive Medicine. Guidance documents on semen analysis interpretation and male infertility evaluation (updated periodically).