A semen analysis is one of the most important tests used to assess male fertility. It is commonly included in the initial fertility evaluation of a couple experiencing difficulty conceiving because it provides information about several characteristics of sperm and semen.

If your doctor has recommended a semen analysis, you may have questions:

“What should I do before the test?”

“What exactly does the test measure?”

“What does it mean if one of my results is low?”

Semen analysis is a straightforward laboratory test, but its results need to be interpreted in the context of the man’s medical history and the fertility picture of the couple. A single result cannot, by itself, confirm or rule out fertility.

What Is a Semen Analysis?

A semen analysis is a laboratory examination of a semen sample used to assess several parameters related to male reproductive function.

Depending on the laboratory, the assessment may include:

• semen volume
• sperm concentration
• sperm motility
• sperm morphology
• the presence of other cells or findings when relevant

Modern semen analysis is performed using standardized laboratory procedures based on the World Health Organization’s guidance for the examination and processing of human semen.

Why Is a Semen Analysis Done?

A semen analysis is a key part of the initial evaluation of male fertility.

When a couple is experiencing difficulty conceiving, both partners should generally be assessed rather than focusing only on the woman or the man. AUA/ASRM guidelines recommend a reproductive history and one or more semen analyses as part of the initial evaluation of the male partner.

The test can help identify:

• low sperm concentration
• reduced sperm motility
• abnormalities in sperm morphology
• absence of sperm in the ejaculate
• other findings that may require further investigation

How Is a Semen Analysis Performed?

The semen sample is usually collected by ejaculation into a sterile container provided by the laboratory.

Depending on the clinic’s instructions, the sample may be collected at the laboratory or, in some cases, at home and delivered promptly to the laboratory.

It is important to follow the laboratory’s specific instructions regarding collection, timing and transportation. These details can affect the reliability of the results.

How Should You Prepare for a Semen Analysis?

Your laboratory will provide specific instructions before the test, including how long you should avoid ejaculation before collecting the sample.

The recommended period can vary depending on the laboratory’s protocol, so it is important to follow the instructions you receive rather than relying on general advice.

You should also tell your doctor about:

• medications you are taking
• recent illness or fever
• previous testicular or reproductive surgery
• infections
• previous fertility problems

This information can be important when interpreting the results.

What Does a Semen Analysis Measure?

A semen analysis evaluates several different characteristics of the sample.

Semen Volume

This is the total amount of semen collected in the sample.

Volume is interpreted together with the other semen parameters and should not be considered a measure of fertility on its own.

Sperm Concentration

Sperm concentration refers to the number of sperm present in a specific volume of semen.

A low sperm concentration may reduce the chances of natural conception, but it does not necessarily mean that pregnancy is impossible.

Sperm Motility

Motility describes how well the sperm move.

Sperm movement is important because sperm need to travel through the female reproductive tract to reach the egg.

Sperm Morphology

Morphology refers to the size, shape and structure of sperm cells.

Morphology is one part of the overall semen analysis and should not be interpreted separately from sperm concentration, motility and the rest of the clinical picture.

What Is a Normal Semen Analysis?

A normal semen analysis means that the main parameters are within the laboratory’s expected reference ranges.

However, there is no single semen parameter that can determine whether a man is fertile or infertile.

AUA/ASRM guidelines emphasize that semen parameters can vary considerably between ejaculates and that values above or below a reference limit do not, by themselves, predict fertility or infertility.

For this reason, semen analysis results should always be interpreted as part of the overall fertility assessment.

What Does an Abnormal Semen Analysis Mean?

An abnormal semen analysis does not automatically mean that a man cannot father a child.

Semen parameters can vary from one sample to another. If the first semen analysis shows significant abnormalities, your doctor may recommend repeating the test.

AUA/ASRM guidelines note that at least two semen analyses, ideally obtained approximately one month apart, are important when the initial analysis is abnormal.

The clinical significance of the result also depends on whether there is one abnormal parameter or several abnormalities at the same time.

What Can Affect Semen Analysis Results?

Sperm production and semen parameters can be influenced by a range of factors.

Your doctor may consider:

• recent fever or illness
• medications
• smoking or substance use
• alcohol consumption
• hormonal disorders
• previous surgery
• infections
• varicocele
• genetic factors

A complete evaluation can help identify potentially treatable causes of male infertility.

Is a Semen Analysis the Only Male Fertility Test?

Not always.

Semen analysis is an important first-line test, but it may not be the only investigation required.

If the results are significantly abnormal or the medical history suggests another underlying problem, additional evaluation may include a physical examination, hormone testing or genetic testing.

For example, specific hormonal and genetic investigations may be recommended in men with severe abnormalities in sperm production or other clinical indications.

Can You Become a Father with a Low Sperm Count?

In many cases, yes.

A low sperm count does not automatically mean that pregnancy is impossible.

Depending on the overall results and the fertility history of both partners, treatment may range from addressing an underlying medical cause to using assisted reproductive techniques.

Some couples may be candidates for intrauterine insemination (IUI), while more significant sperm abnormalities may lead to consideration of IVF or ICSI. The appropriate option depends on the individual circumstances of both partners.

When Should You Have a Male Fertility Evaluation?

A male fertility assessment may be recommended when a couple has been trying to conceive without success. It may also be appropriate earlier when there is a known risk factor for male infertility.

An evaluation can be particularly useful when there is:

• a history of testicular problems
• previous surgery involving the reproductive system
• varicocele
• erectile or ejaculatory difficulties
• previous chemotherapy or radiation therapy
• a known hormonal or genetic condition
• a previous abnormal semen analysis

When a couple is experiencing infertility, evaluation of both partners should generally begin in parallel.

Semen Analysis: One Test Is Not the Whole Picture

A semen analysis is an important first step in understanding male fertility, but its results should never be viewed in isolation.

Sperm concentration, motility, morphology and other parameters need to be considered together with the man’s medical history and the overall fertility picture of the couple.

At Embryowish, male fertility is evaluated as part of a comprehensive approach, helping identify potential factors affecting conception and determine the most appropriate next steps.

If you would like to assess male fertility or have a semen analysis result that you would like to understand better, you can schedule a free initial fertility consultation at Embryowish.