Short answer: a supplement can only be judged against a baseline, so book a semen analysis before you start and repeat it about three months later under the same conditions. Expect some difference even if nothing changed: in one study of 2,566 men, only 51.2% of second tests confirmed the first. The Fertility Factor 5 official page says to test after at least 3 months, yet states a 67-day refund window (page read 31 October 2026).
By Healthy Supplements Editorial Team | Sources read 31 October 2026
Most men who try a fertility supplement never measure anything. They take it for a few weeks, feel the same, and guess. A semen analysis turns that guess into numbers, but only if you test at the right times and compare like with like. This page explains how a semen analysis works, why one result is not the full story, and how to build a simple before-and-after plan. It is a tracking guide, not a promise that any product changes your results. If you are still choosing where to start, read our male fertility guide and our look at whether male fertility supplements work first.
What a semen analysis measures
A semen analysis is a lab test of a semen sample. According to MedlinePlus, it checks volume, sperm count, sperm concentration, motility (movement), morphology (shape), pH and the time the sample takes to liquefy. The same page asks men to avoid ejaculation for 2 to 7 days before the sample so the count is at its highest. StatPearls gives the window as a minimum of 3 days and a maximum of 7 days. Either way, the point of the abstinence rule is consistency: if your first semen analysis follows 4 days of abstinence and your second follows 9, you are comparing two different tests.
| Measure | What it shows | Typical value listed by MedlinePlus |
|---|---|---|
| Volume | How much semen the sample contains | 1.5 to 7.6 mL |
| Sperm count | Total sperm in the sample | More than 39 million |
| Concentration | Sperm per mL | 15 to 259 million per mL |
| Motility | Share of sperm moving efficiently | Over 40% |
| Morphology | Share with a normal shape | Over 4% |
| pH | Acidity of the sample | 7.2 to 8.0 |
| Liquefaction | Time to turn from gel to liquid | 15 to 30 minutes |
Reference ranges differ between labs, so treat the table as a guide and use the ranges printed on your own report. MedlinePlus also notes that abnormal results do not mean permanent infertility; they only suggest sperm may be part of the difficulty and that your provider may order more tests. Our male fertility vitamins evidence page covers the nutrients most often linked to these numbers.
Why one semen analysis can mislead you
The biggest mistake in a before-and-after plan is trusting a single pair of numbers. MedlinePlus says sperm count and semen quality can vary from day to day, and that you may need two or more samples within a week or two. Three studies I opened show how large that variation is.
First, a 2019 paper on two consecutive semen analyses looked at 5,132 samples from 2,566 men at a university fertility center. Only 51.2% of second tests confirmed the first according to WHO criteria. After a normal first result, 27% of second results were pathological, and after a pathological first result, 23% of second results were normal. The authors concluded that two consecutive tests should be done, in line with WHO recommendations.
Second, a Dutch cohort of 5,240 men from subfertile couples reported within-subject variation of 28% to 34% across five semen parameters. Concentration was the most reproducible (intraclass correlation 0.89), while motility (0.58) and morphology (0.60) were less so. The authors said it is reasonable to perform two semen analyses.
Third, a retrospective study of 2,150 samples from 1,075 men asked how far apart two samples should be. Correlation between samples was strongest at different gaps for different measures: concentration peaked at weeks 1, 4 and 5, and total sperm count at weeks 1, 2 and 4. It was a single-hospital, retrospective study of men with no known fertility treatment, and it did not test supplements, so use it only as a reminder that timing and the specific measure both matter.
The practical lesson is simple. A before-and-after semen analysis is a pair of noisy measurements. If the second number looks better, that may be the supplement, or it may be ordinary variation. If it looks worse, the same caution applies. That is why a baseline built from two samples is more useful than one.
A realistic semen analysis timeline for a supplement trial
Here is a simple plan built only from what the sources above say, plus common-sense record keeping. It is not medical advice, and your clinician may change it.
| Step | When | What to do | Why |
|---|---|---|---|
| 1. Baseline | Before you start | Book a semen analysis, ideally two samples a week or two apart | MedlinePlus and StatPearls both mention two or more samples because results vary |
| 2. Start | Day 0 | Change one thing at a time and note the product, dose and start date | Several changes at once make any difference impossible to explain |
| 3. Wait | About 3 months | Take it as directed and avoid early re-testing for reassurance | StatPearls ties a repeat to three months after a full spermatogenesis cycle |
| 4. Repeat | About 3 months in | Repeat the semen analysis at the same lab with the same abstinence days | Keeps the comparison fair |
| 5. Interpret | After the repeat | Compare both results with your clinician, not just the headline count | Variation between tests is large |
StatPearls says that if the semen analysis is abnormal, it can be repeated three months after completing another complete spermatogenesis cycle, and earlier if the count is low or absent. I did not find a single day count for the cycle in the pages I opened that I trusted enough to quote, so this guide uses the three-month interval that both StatPearls and the manufacturer use. If your count is very low, do not wait three months on your own; ask a clinician about timing.
Read the Fertility Factor 5 official page
How to keep your before and after semen analysis comparable
Small differences in how you collect and test can swamp the effect of a supplement. These habits keep the two results comparable.
Use the same lab if you can, because methods and reference ranges differ. Use the same number of abstinence days each time, within the 3 to 7 day window StatPearls gives, and write it on the form. Follow the lab’s collection instructions exactly, since a lost portion of the sample can lower the count. Keep a short log of the date, the product name, the dose on the label and anything unusual such as a recent illness or travel, so you and your clinician can read the two results in context. Finally, look at all the measures together. A better concentration with worse motility is not a clear win, and a single changed number rarely settles anything.
If you are tracking because you are trying to conceive, remember that a semen analysis is only part of the picture. Our lifestyle guide for male fertility and natural options page cover habits that matter alongside any product.
What research says about supplements and semen analysis results
The best overview I opened is the 2022 Cochrane review of antioxidants for male subfertility. It included 90 studies with 10,303 subfertile men and compared 20 different oral antioxidants. The authors rated the evidence low to very low certainty. Antioxidants may increase live birth (odds ratio 1.43, 95% CI 1.07 to 1.91, 12 trials, 1,283 men), but when studies at high risk of bias were removed there was no evidence of increased live birth (odds ratio 1.22, 95% CI 0.85 to 1.75, 8 trials, 827 men). Clinical pregnancy also looked higher (odds ratio 1.89), again with low-certainty evidence.
That means a supplement may help some men, but the research cannot promise it, and it cannot tell you which product will move your own semen analysis. The same caution applies to single minerals. The NIH selenium fact sheet says there is not enough data to determine whether selenium supplements significantly affect male fertility, with some trials showing improvement in certain sperm measures and others showing none. Its zinc fact sheet does not discuss sperm or male fertility at all.
For a deeper look at the tongkat ali extract used in this product, see our page on tongkat ali and fertility, where the one human fertility study was uncontrolled and only 75 of 350 men finished the first three months.
What Fertility Factor 5 says about its own timeline
This site is an affiliate of Fertility Factor 5, so read this section as manufacturer statements, not as proof. I read the official page on 31 October 2026. It names LJ100 (a patented Eurycoma longifolia, or tongkat ali, extract), Panax ginseng, zinc, selenium and BioPerine. Most amounts are not given in the page text, so the Supplement Facts panel on the bottle is what you should check.
| Item | What the manufacturer states (read 31 October 2026) | What it means for tracking |
|---|---|---|
| Named ingredients | LJ100 tongkat ali extract, Panax ginseng, zinc, selenium, BioPerine | Check amounts on the label before you add other supplements |
| LJ100 amount | 200 mg a day is given as the trial amount; the product’s own amount is not stated in the page text | Do not assume the bottle matches the trial |
| Servings per day | Not stated in the page text | Follow the bottle directions |
| Testing advice | Semen analysis after at least 3 months of use | Matches the three-month repeat logic above |
| Refund window | 67 days from receiving the order | Ends before a three-month repeat test is due |
| Price | Not stated in the page text | Check the live checkout page |
| Safety warnings | None in the page text beyond the FDA disclaimer | Read the section below on label checks |
The mismatch between a three-month testing advice and a 67-day refund window is worth knowing. You may reach day 67 before you have a second semen analysis to compare, so decide beforehand whether you will judge the product by results, by tolerance, or by neither. If the refund window matters to you, ask the seller how they handle requests after day 67.
The page also says that 100% of users saw improvement in semen parameters. I do not repeat that claim as fact: it is tied to a 75-man trial with no verifiable citation on the page, and the page itself gives conflicting pregnancy figures in different sections. Our Fertility Factor 5 review and ingredient breakdown go through the label in more detail.
If you decide to try it, keep the tracking plan above and compare your own semen analysis results rather than relying on marketing numbers. You can see the current Fertility Factor 5 offer on the official site and read the label before ordering.
Who should not rely on a supplement, and what to check on the label
Talk to a clinician first if you have known fertility issues, take blood thinners, have diabetes or low blood sugar, or are due for surgery. A supplement does not fix blockages, infections or varicoceles, and an abnormal semen analysis deserves a proper workup.
The NIH Office of Dietary Supplements sets an upper intake level for adults of 40 mg a day of zinc and 400 mcg a day of selenium from all sources. It also says zinc at 50 mg or more for weeks can interfere with copper absorption, and that signs of too much selenium include hair loss, brittle nails, a garlic odor on the breath and a metallic taste. If a formula already contains both minerals, a multivitamin on top could add up.
NCCIH says the most common side effect of Asian ginseng is insomnia, and that it may interfere with blood clotting and lower blood sugar; its page says nothing about male fertility. NCCIH’s guidance on using dietary supplements wisely warns that supplements may interact with medicines and that what is on the label may not be what is in the product. The FDA says it does not approve supplements before they are sold; manufacturers are responsible for evaluating safety and labeling. Tell your provider about every supplement you take.
As a label checklist: confirm the amount of each active ingredient, the serving size, any third-party testing the company actually documents, and the refund terms in writing. Keep the bottle and batch number with your test log.
Verdict: use the supplement as an experiment, not a promise
The honest way to use a supplement is as a three-month experiment with a baseline. Get a semen analysis first, ideally two, change one thing, repeat the semen analysis at the same lab under the same conditions, and read the pair with a clinician. If the numbers improve, that is encouraging but not proof. If they do not, you have saved yourself months of guessing. Either way, the semen analysis tells you more than the label does.
Check Fertility Factor 5 on the official site
Sources I opened for this page
- MedlinePlus: Semen Analysis
- StatPearls: Semen Analysis (NCBI Bookshelf)
- Are WHO Recommendations to Perform 2 Consecutive Semen Analyses Still Valid? (PubMed 30423309)
- Reproducibility and reliability of repeated semen analyses (PubMed 20434148)
- Optimal timing for repeat semen analysis during male infertility evaluation (PMC8267395)
- Antioxidants for male subfertility, Cochrane 2022 (PubMed 35506389)
- NIH ODS: Zinc fact sheet
- NIH ODS: Selenium fact sheet
- NCCIH: Asian ginseng
- NCCIH: Using dietary supplements wisely
- FDA: Dietary supplements
- StatPearls: Histology, Spermatogenesis (NCBI Bookshelf)
- Manufacturer page (affiliate link): Fertility Factor 5 official page, read 31 October 2026
Semen analysis and supplements: frequently asked questions
How long should I wait before repeating a semen analysis after starting a supplement?
The sources I opened point to about three months. StatPearls says an abnormal semen analysis can be repeated three months after another complete spermatogenesis cycle, and it can be repeated earlier if the sperm count is low or absent. The Fertility Factor 5 page also says to test after at least three months. Any earlier repeat is a decision for your clinician.
How many days should I abstain before a semen analysis?
StatPearls gives a minimum of 3 days and a maximum of 7 days. MedlinePlus says 2 to 7 days. Your lab’s instructions come first, and the safest habit is to use the same number of days for the before and after semen analysis.
Is one semen analysis enough?
Sometimes, but not reliably. StatPearls says a single specimen may be sufficient for a normal result while some experts still recommend two, and a 2,566-man study concluded that two consecutive tests should be done because only 51.2% of second tests confirmed the first by WHO criteria.
Why do two semen analysis results from the same man differ?
Sperm counts and quality vary from day to day. A Dutch study of 5,240 men found within-subject variation of 28% to 34% across the main semen parameters, which is why a single before-and-after pair can mislead.
What are normal semen analysis values?
MedlinePlus lists a sperm count above 39 million per sample, motility above 40%, normal shape above 4%, and a volume of 1.5 to 7.6 mL. Labs differ, so use the reference ranges printed on your own report and ask your clinician what the numbers mean for you.
Do antioxidant supplements improve semen analysis results?
Maybe, but the evidence is weak. The 2022 Cochrane review of 90 studies and 10,303 subfertile men rated its evidence low to very low certainty, and the live-birth signal disappeared when studies at high risk of bias were removed.
Does Fertility Factor 5 give a timeline for testing?
Yes. The manufacturer’s page (read 31 October 2026) advises a semen analysis after at least 3 months of use. The same page states a 67-day refund window, so the refund period ends before a three-month repeat test would be due.
Can I add extra zinc or selenium while tracking results?
Check your total first. The NIH upper intake level for adults is 40 mg a day of zinc and 400 mcg a day of selenium from all sources, and zinc at 50 mg or more for weeks can interfere with copper absorption.
Should I see a doctor before starting a supplement trial?
Yes, ideally. A clinician can order the semen analysis, interpret it, and look for causes a supplement will not address. MedlinePlus notes that abnormal results do not mean permanent infertility.
Affiliate disclosure: we earn a commission if you buy through our links, at no extra cost to you. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is for information only and is not medical advice.
