A semen analysis report typically contains 10 or more measurements, and most of them won’t mean much at first glance. The key is knowing which numbers matter most, what the normal thresholds are, and how the different values relate to each other. Here’s how to work through your report section by section.
What the Report Is Comparing Against
Nearly every semen analysis report uses reference values from the World Health Organization (WHO). These thresholds represent the 5th percentile, meaning 95% of men who conceived naturally within a year scored above these numbers. Falling below a reference value doesn’t mean you can’t conceive. It means your result is in the bottom 5% of that group, and further evaluation is worth considering.
The WHO also recommends 2 to 7 days of abstinence before the sample is collected. This matters because the abstinence window directly affects your numbers. Shorter periods (0 to 1 day) tend to produce lower volume, lower concentration, and a lower total count. Longer periods (beyond 7 days) inflate volume and concentration but reduce the percentage of sperm that are actually moving. They also increase DNA damage. If your abstinence period fell outside the 2 to 7 day range, that context is important when reading your results.
Volume, pH, and Liquefaction
The first section of most reports covers the physical properties of the sample. These are easy to overlook, but they give clues about how the reproductive glands are functioning.
Volume refers to the total amount of ejaculate, measured in milliliters. The lower reference limit is 1.4 mL. A consistently low volume can point to incomplete collection, retrograde ejaculation (where semen flows backward into the bladder), or issues with the seminal vesicles or prostate, which produce most of the fluid.
pH should fall between 7.2 and 8.0. Semen is slightly alkaline, which helps protect sperm from the acidic environment of the vaginal canal. A pH below 7.0 paired with low volume can suggest a blockage or absence of the seminal vesicles. Most reports list this without much commentary, but it’s a useful data point if other values are abnormal.
Liquefaction describes how long the sample takes to change from a gel-like consistency to a liquid. This normally happens within 15 to 30 minutes. Delayed or incomplete liquefaction can trap sperm and reduce their ability to move freely, which may affect the motility numbers further down the report.
Concentration vs. Total Sperm Count
This is where many people get confused, because the report lists two numbers that sound like the same thing. They’re not.
Sperm concentration is the number of sperm per milliliter of semen, reported in millions. Think of it as density. The WHO doesn’t set a firm 5th percentile for concentration alone in the latest edition, but 15 million per mL has long been used as a clinical benchmark. Below that level is sometimes labeled oligospermia on your report.
Total sperm count is the full number of sperm in the entire ejaculate. It’s calculated by multiplying concentration by volume. For example, if your concentration is 20 million/mL and your volume is 3 mL, your total count is 60 million. The lower reference limit is 39 million. This number gives a more complete picture than concentration alone, because a man with a high concentration but very low volume could still have a below-average total count.
Motility: Total and Progressive
Sperm count tells you how many are present. Motility tells you how many are actually moving, and how well. Your report will typically break this into two or three categories.
Total motility includes any sperm showing movement of any kind. The lower reference limit is 42%. Progressive motility is the more important number. It captures only the sperm swimming forward in a straight line or large circles, the ones capable of reaching an egg. The threshold here is 30%. Some older reports further split motility into grades A through D, where A is rapid progressive movement, B is slow progressive, C is non-progressive (twitching in place), and D is completely immotile. If your report uses this grading, A plus B together roughly equals progressive motility.
Low motility with a normal count is labeled asthenozoospermia. It can be caused by varicoceles, infections, prolonged abstinence, heat exposure, or lifestyle factors like smoking. If your motility was measured after delayed liquefaction, the number may appear artificially low.
Morphology: Shape and Structure
Morphology measures the percentage of sperm with a normal shape, including a properly formed head, midsection, and tail. Most labs now use the Kruger strict criteria, which requires a minimum of 4% normal forms. Under these criteria, every part of the sperm must meet precise standards, so even minor irregularities get flagged as abnormal.
This means it’s completely normal for the vast majority of your sperm to be classified as abnormal. A result of 6% or 8% normal forms is well within the healthy range, even though it sounds alarming. Below 4% (sometimes written as teratozoospermia) has been associated with reduced fertilization rates, particularly in natural conception, because abnormally shaped sperm have a harder time binding to and penetrating the egg.
Your report may also break down the specific types of defects observed: head defects (too large, too small, or round instead of oval), midpiece defects, and tail defects (short, coiled, or absent). This detail matters more to a fertility specialist deciding on treatment options than it does for your own interpretation, but a very high rate of one specific defect type can occasionally point to a genetic issue.
Round Cells and White Blood Cells
Most reports include a line for “round cells,” which is a catch-all term for any non-sperm cells in the sample. These can be immature sperm cells (which are harmless) or white blood cells (which may signal infection or inflammation).
The standard cutoff for concern is 1 million white blood cells per mL. Above that level, the report may note leukocytospermia. Some research suggests that even lower concentrations, around 0.3 million per mL, are enough to indicate meaningful inflammation. If white blood cells are elevated, your doctor may order a semen culture to check for infection, since untreated genital tract infections can damage sperm over time.
DNA Fragmentation (If Included)
Not every standard analysis includes this, but if yours does, you’ll see a DNA fragmentation index, or DFI. This measures the percentage of sperm with damaged DNA strands. A DFI of 15% or below is considered normal. Between 15% and 30% is average but worth monitoring. At 30% or above, sperm DNA integrity is considered poor, which can affect both natural conception and outcomes with assisted reproduction.
DNA fragmentation can be elevated even when concentration, motility, and morphology all look normal. That’s why it’s sometimes ordered as a follow-up when a couple has unexplained infertility or recurrent miscarriage despite a seemingly normal semen analysis. Oxidative stress, smoking, infections, and prolonged abstinence are all known contributors.
Common Terms on the Report
Many reports include diagnostic labels alongside the raw numbers. Here’s what the most common ones mean:
- Normozoospermia: All values within normal reference ranges.
- Oligospermia: Sperm concentration below 15 million per mL.
- Asthenozoospermia: Progressive motility below the reference threshold.
- Teratozoospermia: Normal morphology below 4%.
- Oligoasthenoteratozoospermia (OAT): All three, count, motility, and morphology, are below normal. This is the most common pattern seen in male infertility evaluations.
- Azoospermia: No sperm detected in the sample at all. This affects roughly 1% of men and accounts for 10 to 15% of male infertility cases.
Why One Test Isn’t Enough
Sperm production takes about 72 to 76 days, so your results reflect conditions from roughly two to three months ago. A fever, a course of medication, a period of heavy stress, or even a hot tub habit during that window can temporarily drag numbers down. This is why fertility clinics typically require two to three analyses spread over a three-month period before drawing conclusions about baseline fertility. If the first analysis comes back normal, a repeat usually isn’t necessary.
Natural variation between samples can also be significant. One study from the same person collected a week apart can show meaningfully different concentration and motility values. A single below-threshold result, especially one that’s borderline, is not a diagnosis. It’s a reason to test again under the same collection conditions.