A semen analysis report arrives as a page of numbers and abbreviations — total sperm count, progressive motility, normal morphology, volume, pH, viscosity — and is handed to couples with varying degrees of explanation, ranging from a brief clinical summary to no explanation at all.
For most men receiving this report for the first time, the experience is disorienting. The numbers are unfamiliar. The reference ranges are printed alongside but not explained. The terminology — particularly words like "asthenospermia," "oligospermia," and "teratospermia" — sounds alarming in ways that may or may not be clinically justified. And the fundamental question — is this normal, and what does it mean for our ability to have children — often goes imperfectly answered.
This article is a plain language guide to the semen analysis report. It explains every parameter, what it measures, what the normal range is, what it means when a parameter falls outside that range, and — critically — what the semen analysis does and does not tell you about the male partner's fertility.
That last point is particularly important and is addressed explicitly in this guide: there is a dimension of male fertility that the standard semen analysis does not assess, and understanding that gap is as important as understanding the report itself.
What Is a Semen Analysis?
A semen analysis is a laboratory examination of a semen sample that assesses several parameters related to sperm quantity, movement, and appearance. It is the primary diagnostic test for male fertility and is the starting point of any investigation into a couple's infertility that involves the male partner.
The sample is typically collected by masturbation after a period of sexual abstinence — usually two to five days — and examined in the laboratory within one hour of collection. The abstinence period matters because too short an abstinence produces a sample with reduced volume and count, while too long an abstinence produces a sample with more sperm but of lower quality and with higher DNA fragmentation.
The World Health Organization (WHO) publishes reference values for semen parameters — based on data from men who have achieved a pregnancy within twelve months — against which individual results are compared. These reference values were last updated in 2021 (sixth edition) and are the most widely used benchmark in clinical practice. Different laboratories may report against the fifth edition (2010) reference values, which differ slightly for some parameters.
Parameter One: Volume
What it measures: The total volume of the ejaculate in millilitres.
Normal range: 1.4 mL or more (WHO 2021). Some laboratories report the fifth edition reference of 1.5 mL or more.
What it means: Semen volume reflects the secretory function of the accessory glands — primarily the seminal vesicles and the prostate — that contribute the bulk of seminal fluid. The sperm themselves constitute only a tiny fraction of the ejaculate volume.
When it is low (hypospermia): Low volume — below 1.4 mL — can result from incomplete collection of the sample (the most common reason, which can be addressed simply by repeating the test), retrograde ejaculation (where semen enters the bladder rather than being expelled), obstruction or absence of the seminal vesicles, or ejaculatory duct obstruction. When the volume is very low and the sperm count is also very low or zero, these anatomical causes become the primary diagnostic focus.
When it is high: High semen volume above 6 mL is less commonly clinically significant but may dilute the sperm concentration, reducing the count per millilitre. The total sperm count — which multiplies concentration by volume — is the more clinically meaningful number.
Parameter Two: Sperm Concentration
What it measures: The number of sperm per millilitre of semen, reported in millions per millilitre (M/mL) or as total sperm count when multiplied by volume.
Normal range: 16 million sperm per millilitre or more (WHO 2021). Total sperm count — concentration multiplied by volume — should be 39 million or more per ejaculate.
What it means: Sperm concentration reflects how many sperm are present in the semen. It is one of the three parameters most commonly assessed in a standard semen analysis and is frequently the number that causes the most concern when it falls below the reference range.
When it is low (oligospermia): A sperm count below 16 million per millilitre is defined as oligospermia. Mild oligospermia (5 to 15 million/mL) may allow natural conception with some difficulty and is often manageable with IUI or IVF. Moderate oligospermia (1 to 5 million/mL) significantly reduces natural conception probability and usually requires IVF with ICSI. Severe oligospermia (below 1 million/mL) almost always requires IVF with ICSI.
When it is zero (azoospermia): The absence of sperm in the ejaculate is azoospermia. As discussed in detail in our articles on TESA and male infertility, azoospermia does not necessarily mean biological fatherhood is impossible — the distinction between obstructive azoospermia (where sperm production is normal but a blockage prevents ejaculation) and non-obstructive azoospermia (where sperm production is impaired) determines whether sperm can be surgically retrieved.
Parameter Three: Motility — Total and Progressive
What it measures: The percentage of sperm that are moving, and the quality of that movement. Total motility includes all sperm that are moving in any direction. Progressive motility specifically measures sperm that are moving forward in a linear or large-circle pattern — the movement associated with the ability to reach and fertilize an egg.
Normal range: Total motility — 42 percent or more of sperm showing any movement (WHO 2021). Progressive motility — 30 percent or more of sperm showing forward movement.
What it means: Motility reflects the sperm's ability to swim — and specifically to swim toward and into the egg. Sperm that are not moving, or that are moving in circles or vibrating in place without progressing, cannot fertilize an egg naturally.
When it is low (asthenospermia): Reduced progressive motility — below 30 percent — is defined as asthenospermia. It is one of the most common semen abnormalities and can occur in conjunction with reduced count (oligoasthenospermia) or normal count. Causes include oxidative stress, varicocele, infection, sperm DNA fragmentation, and various lifestyle factors. The treatment approach depends on the severity and the underlying cause.
The practical implication for IVF: In IVF with ICSI, the embryologist selects individual sperm for injection into eggs — motility is less critical in the ICSI context because the selected sperm does not need to swim independently. However, severely reduced motility may indicate underlying sperm quality issues that affect fertilization and embryo development even when ICSI is used.
Parameter Four: Morphology
What it measures: The percentage of sperm that have a normal shape — assessed by examining the size and shape of the head, midpiece, and tail of the sperm under a microscope.
Normal range: 4 percent or more of sperm with normal morphology by strict Kruger criteria (WHO 2021). This threshold may seem very low — it means that up to 96 percent of sperm can be abnormally shaped and still fall within the reference range — and the reference value does reflect a clinical reality: abnormally shaped sperm are the norm in human ejaculate, and what matters is whether the proportion of normally shaped sperm meets the minimum threshold.
What it means: Morphology reflects the quality of the sperm manufacturing process — spermatogenesis. Abnormally shaped sperm may have impaired ability to penetrate and fertilize an egg. When morphology is severely reduced, natural fertilization is less likely and IVF with ICSI is more often required.
When it is low (teratospermia): Morphology below 4 percent normal forms is defined as teratospermia. Isolated teratospermia — normal count and motility with low morphology — has a variable clinical significance. Mild teratospermia may have limited impact on fertility, particularly with IVF and ICSI. Severe teratospermia — particularly certain specific morphological defects such as globozoospermia (round-headed sperm) — is associated with more significant fertilization problems.
A critical note on how morphology is assessed: Morphology reference values differ significantly depending on the assessment method used. WHO criteria and strict Kruger criteria produce different reference ranges. It is important to know which criteria your laboratory used when interpreting your morphology result.
Parameter Five: Vitality
What it measures: The percentage of sperm that are alive — assessed by a dye exclusion test or hypoosmotic swelling test. Alive sperm exclude the dye (or swell in hypoosmotic solution); dead sperm absorb the dye (or do not swell).
Normal range: 54 percent or more live sperm (WHO 2021).
What it means: Vitality is particularly important in samples where motility is very low — distinguishing between sperm that are immotile but alive (which can be used in ICSI) and sperm that are immotile because they are dead (necrospermia). High necrospermia — a large proportion of dead sperm — is associated with genital tract infection or severe oxidative damage.
Parameter Six: Volume, pH, and Appearance
Volume has been covered above.
pH: Normal semen pH is 7.2 or above — slightly alkaline. Very low pH (acidic semen) in combination with very low volume and absent or very few sperm may suggest ejaculatory duct obstruction or absence of the seminal vesicles. Very high pH may suggest infection.
Appearance and viscosity: Normal semen is initially viscous — it coagulates immediately after ejaculation — and then liquefies within 60 minutes as seminal vesicle proteins are cleaved by prostate enzymes. Failure to liquefy (hyperviscosity) can impair sperm motility in vivo. Normal liquefied semen has a gray-white opalescent appearance. Yellow semen may suggest infection or jaundice.
Parameter Seven: Leukocytes (White Blood Cells)
What it measures: The presence of white blood cells in the semen.
Normal range: Below 1 million leukocytes per millilitre (WHO 2021).
What it means: Elevated leukocytes in semen (leukocytospermia) indicate infection or inflammation of the genital tract. This is clinically significant because the reactive oxygen species produced by white blood cells cause oxidative damage to sperm DNA — elevated leukocytospermia is a contributor to sperm DNA fragmentation. Treatment of the underlying infection — identified through semen culture — reduces leukocytospermia and may improve sperm DNA integrity.
What the Semen Analysis Does Not Tell You
This is the section of this guide that is most important for couples who have been told — or have assumed — that a normal semen analysis means the male partner's fertility is fully assessed.
A normal semen analysis does not mean the male partner is contributing equally healthy reproductive material to the IVF process. It means that the count, motility, and morphology — the three parameters measured by standard analysis — are within the reference ranges for those three measurements. It says nothing about the genetic integrity of the DNA within the sperm.
Sperm DNA fragmentation — the extent of damage to the genetic material within the sperm — is not measured by any standard semen analysis parameter. A man with perfectly normal count, motility, and morphology can have severely elevated sperm DNA fragmentation. And elevated sperm DNA fragmentation — a DFI above 25 to 30 percent — is associated with poor embryo developmental competence, failed implantation, and early pregnancy loss, even when standard semen parameters are entirely normal.
This gap in the standard semen analysis is one of the most important — and most frequently overlooked — clinical facts in male fertility assessment. At Metro IVF, sperm DNA fragmentation testing is a routine component of every male partner's evaluation, regardless of what the standard semen analysis shows. It is not an optional test for cases where the standard analysis shows abnormalities. It is a standard test performed in every case — because its results affect clinical management even when all other parameters are normal.
Reading the Report: A Practical Summary
When you receive a semen analysis report, reading it should follow a systematic sequence.
Start with the total sperm count — concentration multiplied by volume. This gives the total number of sperm in the ejaculate and is more clinically meaningful than concentration alone.
Then look at progressive motility — the percentage of sperm moving forward. This, combined with total count, gives you the total motile sperm count — the number of sperm in the sample that are both present and capable of swimming forward.
Then look at morphology — the percentage of normally shaped sperm. Place this in context with the count and motility findings.
Note any abnormal findings in the physical parameters — pH, liquefaction, viscosity, leukocytes — that may point toward infection or anatomical issues.
Then ask the question that the report cannot answer: has sperm DNA fragmentation been tested? If not, the picture is incomplete, and completing it may be the most important next step in the male fertility evaluation.
Your Next Step
If you have received a semen analysis report and are uncertain what it means for your fertility — or if you have been told your semen analysis is normal but your IVF cycles have nonetheless failed — a consultation with Dr. Ashish Soni at Metro IVF in Ambikapur will give you the most complete and individually tailored assessment of your male partner's fertility available.
The semen analysis is the starting point of the male evaluation. At Metro IVF, it is never the ending point.
Metro IVF Test Tube Baby Center Ambikapur, Chhattisgarh metrofertility.in Led by Dr. Ashish Soni — North India's First Fertility Super Specialist
Your semen analysis report is the beginning of the male fertility picture. Book your consultation with Dr. Ashish Soni at Metro IVF today — and get the complete picture.