A semen analysis report prints a stack of numbers next to a stack of reference ranges. The first thing to understand is that those ranges are not pass/fail cutoffs. Most labs follow the World Health Organization laboratory manual. The 2021 sixth edition sets the lower reference limits at the fifth percentile of men who conceived within 12 months. That means 5 percent of fertile men fall below the listed numbers.
That detail matters because a result just below a reference limit is not a fertility verdict. It is a flag to look closer.
The reference values from WHO 2021
The sixth edition of the WHO manual lists these lower reference limits:
- Semen volume: 1.4 mL or more
- Sperm concentration: 16 million per mL or more
- Total sperm number: 39 million per ejaculate or more
- Progressive motility: 30 percent or more
- Total motility: 42 percent or more
- Vitality: 54 percent or more
- Normal morphology: 4 percent or more
These are the fifth percentile values, not an average. The average fertile man tends to produce numbers well above these thresholds.
Concentration is only half the picture
Sperm concentration is cells per milliliter. Total sperm count is concentration multiplied by volume. Clinicians often weigh total count more heavily than concentration because a normal concentration inside a very small volume still means few total sperm.
A report with 2.5 mL of semen and 20 million sperm per mL contains 50 million total sperm. A report with 1.0 mL of semen and the same 20 million per mL contains 20 million total sperm. Same concentration, very different total.
You can do that arithmetic yourself. Multiply volume by concentration and compare the total to 39 million. That gives a better sense of the whole ejaculate than looking at concentration alone.
Motility and total progressive motile count
Motility is divided into three categories: progressive, non-progressive, and immotile.
Progressive means the sperm swim forward. Non-progressive means the tail moves but there is no forward progress. Immotile means no movement at all. Labs report progressive motility separately because that population is the one most likely to reach the egg. Total motility includes progressive plus non-progressive.
The most useful number in many fertility evaluations is the total progressive motile count. It is volume in mL times concentration in millions per mL times the fraction of progressively motile sperm.
For example, a sample with 2.5 mL volume, 20 million per mL concentration, and 40 percent progressive motility has 2.5 times 20 times 0.40, or 20 million progressively motile sperm. That single number combines the three most important semen parameters into one figure and often guides clinical decisions more than any single row on the report.
Morphology: 4 percent normal is not a typo
Morphology is the strict shape test. The lab examines sperm under high magnification and scores the head, midpiece, and tail against a tightly defined normal shape.
The WHO lower reference limit is 4 percent normal forms using strict criteria. That means a sample can have 96 percent abnormal forms and still sit at the threshold. Many men see that number and assume something is wrong. It is not an error. The test is deliberately unforgiving.
A low morphology score by itself, with good count and good motility, tends to carry less weight. Fertility clinics see pregnancies with low morphology regularly. The conversation changes when low morphology shows up alongside low count or low motility, because then several parameters are moving in the same direction.
Volume, pH, vitality, and the other rows
Semen volume comes mostly from the seminal vesicles and prostate, not the testicles. The testicles contribute the sperm. Low volume can mean a short abstinence period, an incomplete collection, retrograde ejaculation where semen goes into the bladder, or a blockage. It does not automatically mean a sperm production problem.
pH usually runs 7.2 or higher. A low pH with very low volume can point toward ejaculatory duct obstruction or congenital absence of the vas deferens. A high pH is generally less informative.
Vitality answers a specific question: are the immotile sperm alive or dead? If vitality is high but motility is low, the sperm are alive but not moving well. If vitality is low, a large proportion of the sperm are dead, which points toward different causes.
Round cells on a report are usually white blood cells. A level above 1 million per mL can suggest inflammation or infection. Labs sometimes run a separate test to confirm whether the round cells are leukocytes or immature sperm cells.
Liquefaction time occasionally appears on reports. Semen normally liquefies within 20 to 30 minutes after ejaculation. A long liquefaction time is noted but rarely drives decisions on its own.
Hormone results: FSH, LH, testosterone, and the rest
A full fertility workup for men often includes bloodwork alongside the semen analysis. The main hormones are FSH, LH, testosterone, SHBG, estradiol, and prolactin.
FSH and LH are pituitary hormones. FSH drives the Sertoli cells in the testicles to support sperm production. LH signals the Leydig cells to make testosterone.
A high FSH with a low sperm count often points toward the testicle itself. The brain increases FSH output because the Sertoli cells are not responding normally. Low FSH and low LH together can point upstream to the pituitary or hypothalamus, where the signaling starts.
Testosterone results need context. Total testosterone is the headline number, but SHBG changes that picture. SHBG is a protein that binds testosterone. Low SHBG can make total testosterone look low while free testosterone stays normal. High SHBG does the opposite. A lab may report free testosterone directly, or it may calculate free testosterone from total testosterone, SHBG, and albumin.
Estradiol is a small amount of estrogen made from testosterone. High estradiol can feed back to the brain and lower LH and testosterone output. Prolactin, when elevated, can also suppress the hormones that drive sperm production.
Labs report their own reference ranges because the assays differ. One lab may flag a total testosterone of 320 ng/dL as low while another does not. Testosterone also changes through the day and is highest in the morning, which is why morning draws are more comparable over time.
DNA fragmentation and other add-on tests
A standard semen analysis looks at count, movement, and shape. It does not measure the DNA inside the sperm head. DNA fragmentation tests such as SCSA, TUNEL, and COMET measure breaks in that DNA.
DNA fragmentation testing is not a first-line test. It tends to enter the picture after unexplained infertility, recurrent pregnancy loss, or repeated poor embryo development. The results are reported as a DNA fragmentation index, usually a percentage of sperm with fragmented DNA. Interpretation depends on the specific test used, the lab, and the clinical context.
Antisperm antibodies are another occasional add-on. The lab may check for them when sperm clump together or when motility is unexpectedly low. The result is reported as a percentage of sperm bound by antibodies.
Neither of these tests replaces a standard semen analysis. They add information when the baseline picture is incomplete.
One abnormal sample is not a diagnosis
Sperm output varies considerably in the same man from month to month. Illness, fever, poor sleep, alcohol use, a short or long abstinence window, and recent heat exposure all move the numbers.
The sperm in any given ejaculate began production roughly 10 weeks earlier. A fever in the past two to three months can lower count and motility on a current sample. Sauna-level heat temporarily lowers sperm count and can worsen morphology (Garolla et al., Human Reproduction, 2013). The effect appears reversible once the heat exposure stops, since sperm production requires the testicles to sit a few degrees cooler than core body temperature (Shefi et al., Fertility and Sterility, 2007).
This is why a single abnormal sample usually leads to a repeat test after 2 to 3 months. It is also why collection conditions matter. The typical instruction is 2 to 5 days of abstinence before the sample. A shorter abstinence window lowers volume and count. A longer one can reduce motility. If the sample was collected in a clinic room or at home, how quickly it reached the lab also matters.
What a report example looks like when you put it together
Consider a report with these values: volume 2.6 mL, concentration 14 million per mL, progressive motility 32 percent, morphology 3 percent.
Total count is 2.6 times 14, or 36.4 million, just below the 39 million threshold. Total progressive motile count is 2.6 times 14 times 0.32, or 11.6 million. Morphology sits at 3 percent, one point below the reference limit.
That is not a clean normal result. It is also not a zero result. A clinician would likely repeat the sample after a few months, check FSH and LH, and ask about recent illness, heat exposure, medications, and lifestyle. The numbers alone do not say whether this man will conceive without help. They direct the next questions.
Questions to ask after you get results
You do not need to decode the report alone. A few questions can focus the next conversation:
- Was the sample collected after the right abstinence window and delivered to the lab within the proper time?
- Which values fell below the fifth percentile, and by how much?
- What is the total progressive motile count?
- Should FSH, LH, testosterone, and prolactin be checked?
- Is a repeat sample warranted, and when?
- Would DNA fragmentation testing add anything useful in this case?
Home sperm tests are another starting point, but they measure less than a lab analysis. Most home kits estimate concentration, and some estimate motility. They rarely measure morphology, volume, vitality, or hormones. A normal home result can miss a problem. An abnormal home result still needs a lab semen analysis before any conclusions are drawn.
Sperm parameters are one part of the fertility equation. A low number points toward further testing, not a final answer. The point of reading the report correctly is to ask better questions and avoid both false panic and false reassurance.
This content is for educational purposes only and is not medical advice. Oakman products are designed for physical comfort and cooling; they make no claims about fertility, sperm quality, or hormone levels. Consult a healthcare professional for personalized advice.