Infertility can affect couples emotionally and psychologically, and concerns about delayed conception are often unfairly directed toward women. However, male factors contribute to approximately half of infertility cases, either alone or in combination with female factors. This is why a semen analysis test is one of the first and most important investigations recommended when a couple experiences difficulty conceiving.
A semen analysis test evaluates the quantity and quality of sperm in a semen sample. Also known as seminal fluid analysis, this laboratory examination helps assess sperm concentration, motility, morphology, and other characteristics that may influence male fertility.
In some cases, a semen analysis test is accompanied by hormonal blood tests to investigate potential problems affecting sperm production. In this comprehensive guide, we explain what the test measures, when it may be needed, the common causes of male infertility, and how to prepare for accurate results.
When Should a Man Get a Semen Analysis Test?
A semen analysis test may be recommended in several situations, depending on a man's medical history, symptoms, and reproductive goals.
1. Difficulty Conceiving
Couples are generally advised to seek an infertility evaluation after 12 months of regular, unprotected intercourse without achieving pregnancy. If the female partner is 35 or older, evaluation is generally recommended after six months. Earlier assessment may be appropriate when known risk factors are present.
Both partners should be evaluated when indicated, as fertility difficulties may involve male factors, female factors, or a combination of both.
2. Previous Medical Conditions or Risk Factors
A semen analysis test may be appropriate for men with a history of:
- Testicular injury or surgery.
- Undescended testicles during childhood.
- Mumps involving the testicles.
- Chemotherapy or radiation therapy.
- Pelvic or reproductive tract surgery.
- Medical conditions known to affect sperm production.
3. Hormonal or Physical Symptoms
Additional medical evaluation may be necessary if a man experiences reduced sexual desire, erectile difficulties, breast enlargement, testicular pain or swelling, or other symptoms that may suggest a hormonal or reproductive health problem.
These symptoms do not automatically indicate infertility, but they may warrant further investigation.
4. Fertility Planning
Some men seek a semen analysis test before attempting conception, particularly when they have relevant medical risk factors or concerns about their reproductive health.
However, a single semen analysis cannot guarantee future fertility or predict with certainty whether a man will be able to father a child.
What Does a Semen Analysis Test Measure?
A semen analysis test evaluates several characteristics of semen and sperm. These measurements help clinicians identify potential abnormalities and determine whether further investigation is necessary.
1. Sperm Count and Concentration
Sperm concentration refers to the number of sperm present in one milliliter of semen, while total sperm count refers to the number of sperm in the entire ejaculate.
According to the World Health Organization's sixth-edition laboratory manual, the lower reference limit for sperm concentration is approximately 16 million sperm per milliliter. The lower reference limit for total sperm number is approximately 39 million sperm per ejaculate.
These figures are reference values rather than absolute boundaries between fertility and infertility.
Low sperm concentration is known as oligozoospermia. A very low count may reduce the probability of natural conception, although pregnancy may still be possible depending on the overall clinical situation.
Azoospermia refers to the absence of sperm in the ejaculate. If no sperm are detected, additional testing may be required to investigate possible obstruction, impaired sperm production, or other underlying conditions.
2. Sperm Motility
Sperm motility describes the ability of sperm to move. Effective movement is important because sperm must travel through the female reproductive tract to reach the egg.
Motility is commonly classified into the following categories:
- Progressive motility: Sperm move forward, either in a straight line or along a large circular path.
- Non-progressive motility: Sperm move but do not progress effectively forward.
- Immotile sperm: Sperm show no movement.
The lower reference limits in the WHO sixth-edition manual are approximately 42% for total motility and 30% for progressive motility.
Reduced sperm motility is called asthenozoospermia. It may affect the likelihood of natural conception, particularly when combined with low sperm concentration or other abnormalities.
3. Sperm Morphology
Sperm morphology refers to the size and shape of sperm cells. Laboratory specialists examine characteristics such as the head, midpiece, and tail.
A sperm cell with typical morphology generally has an appropriately shaped head, a well-formed midpiece, and a tail that supports movement.
Using strict morphological criteria, the lower reference limit for normal sperm forms is approximately 4%.
Abnormal sperm morphology is known as teratozoospermia. However, a result below the reference limit does not automatically mean that natural conception is impossible. Morphology must be interpreted alongside sperm count, motility, medical history, and other clinical findings.
4. Semen Volume and Other Parameters
A semen analysis test also evaluates additional characteristics, including:
- Semen volume: The amount of semen collected in the sample. The WHO lower reference limit is approximately 1.4 mL.
- Liquefaction time: The time required for semen to become more fluid after ejaculation.
- Viscosity: The thickness and flow characteristics of the sample.
- pH: A measurement of acidity or alkalinity that may help identify certain reproductive tract abnormalities.
- Sperm vitality: The proportion of live sperm, particularly when motility is reduced.
- White blood cells: Increased numbers may suggest inflammation or infection and may require further assessment.
No single parameter can provide a complete assessment of male fertility. Results should be interpreted together, and an abnormal finding may require a repeat test or additional investigation.
Additional Hormonal Tests for Male Fertility
Although a semen analysis test is a central part of the initial evaluation, hormonal blood tests may be recommended when the results, symptoms, or medical history suggest an endocrine problem.
1. Testosterone Test
Testosterone is an important male sex hormone involved in sexual function and reproductive health. Testosterone deficiency may be associated with reduced libido and impaired reproductive function.
However, sperm production depends on a complex hormonal system within the testes. Taking testosterone medication without appropriate medical supervision can suppress sperm production and may cause or worsen infertility.
2. Follicle-Stimulating Hormone (FSH)
FSH is produced by the pituitary gland and plays an important role in supporting sperm production.
An elevated FSH level, particularly when accompanied by abnormal semen results, may suggest impaired sperm production within the testes. The result must be interpreted in the context of the complete clinical evaluation.
3. Luteinizing Hormone (LH)
LH stimulates Leydig cells in the testes to produce testosterone.
Measuring LH alongside testosterone and FSH can help clinicians investigate certain hormonal causes of male reproductive dysfunction.
4. Prolactin Test
Abnormally elevated prolactin levels may interfere with reproductive hormone regulation and contribute to reduced libido, erectile difficulties, or fertility problems.
Prolactin testing is generally ordered when symptoms or other findings indicate that it may be relevant, rather than as an obligatory test for every man.
Depending on the case, a clinician may also recommend thyroid function tests, genetic testing, or other investigations.
Common Causes of Male Infertility
When a semen analysis test reveals abnormal results, the next step is to investigate possible underlying causes.
1. Varicocele
A varicocele is an enlargement of veins within the scrotum. In some men, it is associated with increased testicular temperature, oxidative stress, and impaired sperm production or quality.
Not every varicocele causes infertility, and treatment decisions depend on the clinical examination, semen results, symptoms, and reproductive goals.
2. Infections and Inflammation
Certain infections and inflammatory conditions affecting the reproductive tract may interfere with sperm production, sperm function, or the transport of sperm.
A history of mumps involving the testes may also be relevant. However, not every reproductive tract infection causes permanent fertility problems.
3. Hormonal Disorders
Abnormalities involving testosterone, FSH, LH, prolactin, or thyroid function may affect reproductive health. The underlying cause determines which treatments, if any, are appropriate.
4. Lifestyle and Environmental Factors
Several lifestyle and environmental factors may be associated with poorer semen quality:
- Smoking: May negatively affect sperm quality and reproductive health.
- Excessive alcohol consumption: May contribute to hormonal and reproductive problems.
- Obesity: Can be associated with hormonal changes and reduced reproductive function.
- Heat exposure: Certain occupational or environmental exposures may affect testicular function.
- Toxic chemicals: Exposure to some pesticides, heavy metals, and other hazardous substances may impair reproductive health.
- Medications and treatments: Some medications, chemotherapy, and other treatments may affect sperm production.
- Genetic conditions: Chromosomal abnormalities, including Klinefelter syndrome, and certain genetic changes may impair sperm production.
Psychological stress can also affect sexual desire and well-being. However, it should not be assumed to be the sole cause of abnormal semen results.
How to Prepare for a Semen Analysis Test
Proper preparation is essential for obtaining a sample that can be evaluated accurately. Before your semen analysis test, follow the instructions provided by your laboratory.
1. Follow the Recommended Abstinence Period
The WHO laboratory manual recommends an abstinence period of two to seven days before sample collection. Abstinence means avoiding ejaculation during this period.
Follow your laboratory's specific instructions and try to keep the abstinence period consistent if a repeat sample is required.
2. Inform the Laboratory About Medications
Tell your healthcare provider about all prescription medicines, over-the-counter products, supplements, and recent medical treatments you are taking.
Do not stop prescribed medication without medical advice.
3. Collect the Sample Correctly
The sample is usually collected by masturbation into a sterile container supplied or approved by the laboratory.
Avoid using ordinary condoms, lubricants, or saliva unless the laboratory specifically provides an approved collection method. These substances may interfere with the sample.
Wash your hands and genital area before collection, avoid touching the inside of the container, and collect the entire ejaculate. Inform the laboratory if any part of the sample is lost.
4. Follow the Laboratory's Instructions for Sample Delivery
Collection at the laboratory is often preferred because the sample can be processed promptly.
If home collection is permitted, follow the laboratory's instructions regarding temperature and delivery time. The sample generally needs to reach the laboratory within one hour, and it should not be exposed to extreme temperatures.
5. Avoid Unnecessary Changes Before Testing
Do not introduce unproven supplements or make abrupt medication changes to try to improve your results. Inform your clinician about recent fever, illness, or other factors that could affect interpretation.
A semen analysis test may need to be repeated because sperm parameters can vary between samples.
Book a Semen Analysis Test at Nawat Medical Laboratory
Choosing an experienced laboratory is an important part of obtaining reliable semen analysis results. At Nawat Medical Laboratory, patients can inquire about male fertility testing and related laboratory investigations.
Our laboratory services aim to support patients and healthcare professionals through appropriate testing procedures and clear reporting.
When booking a semen analysis test, consider asking about the following:
- Laboratory procedures: Confirm how sperm concentration, motility, morphology, and other relevant parameters are evaluated.
- Qualified laboratory personnel: Ask about the laboratory's quality assurance procedures and staff expertise.
- Privacy: Confirm the arrangements available for confidential sample collection.
- Additional investigations: Ask whether hormonal blood tests, such as testosterone, FSH, LH, and prolactin, are available when medically indicated.
- Results and follow-up: Confirm how results are delivered and whether the report includes reference values.
The appropriate tests depend on your individual circumstances and your clinician's recommendations. An abnormal result does not necessarily mean that you cannot conceive, and a normal result does not guarantee pregnancy.
For more information about available services, visit Nawat Medical Laboratory.
Frequently Asked Questions About the Semen Analysis Test
1. What Is the Medical Name for a Male Fertility Test?
The most common initial laboratory test is called a semen analysis test, also known as semen analysis or seminal fluid analysis. It evaluates sperm concentration, motility, morphology, and other characteristics of the semen sample.
2. Which Tests Are Needed to Assess Male Fertility?
The initial assessment usually includes a reproductive and medical history and one or more semen analyses. Depending on the findings, a clinician may recommend testosterone, FSH, LH, prolactin, genetic testing, or other investigations.
Not every man requires all of these tests.
3. What Are the Signs of Male Infertility?
Male infertility may cause no noticeable symptoms. Some men experience reduced libido, erectile difficulties, testicular swelling, or other symptoms related to an underlying condition. However, these symptoms alone cannot confirm infertility.
A semen analysis test, combined with an appropriate clinical evaluation, helps investigate potential fertility problems.
4. How Much Does a Semen Analysis Test Cost?
The cost of a semen analysis test varies depending on the laboratory, the services included, and whether additional investigations are required.
Contact Nawat Medical Laboratory directly to confirm current prices, available packages, preparation instructions, and appointment arrangements.
5. What Is a Normal Sperm Count for Fertility?
According to the WHO sixth-edition laboratory manual, the lower reference limits include approximately 16 million sperm per milliliter and 39 million sperm in the entire ejaculate.
The lower reference limits for total sperm motility, progressive motility, and normal morphology are approximately 42%, 30%, and 4%, respectively.
These values are not absolute fertility cutoffs. Pregnancy depends on several factors involving both partners, and results must be interpreted by a qualified healthcare professional.
6. Is a Serum Analysis Test the Same as a Semen Analysis Test?
No. A serum analysis test generally refers to laboratory testing of serum, the liquid component of blood after clotting. A semen analysis test examines semen and sperm to help assess male reproductive health.
The two tests are different and should not be used interchangeably.
7. Does an Abnormal Semen Analysis Mean Infertility?
Not necessarily. An abnormal result may indicate a potential fertility issue, but it does not automatically mean that natural conception is impossible.
Your clinician may recommend repeating the test, reviewing your medical history, performing a physical examination, or ordering additional investigations.
Conclusion
Difficulty conceiving can be challenging for couples, but an appropriate medical evaluation can help identify potential causes and guide the next steps.
A semen analysis test is an important starting point in assessing male reproductive health. It provides information about sperm concentration, motility, morphology, and other semen characteristics that may influence fertility.
Preparing correctly, using a qualified laboratory, and interpreting the results with a healthcare professional can help ensure that the findings are understood in the right context.
If you have concerns about male fertility or have been trying to conceive without success, speak with your healthcare provider about whether a semen analysis test is appropriate for you.
Take the first step toward understanding your reproductive health.
Visit Nawat Medical Laboratory to learn more about available laboratory services.
Medical disclaimer: This article is intended for general educational purposes only and does not replace professional medical advice, diagnosis, or treatment.
Medical References
- MedlinePlus – Semen Analysis
- World Health Organization – Laboratory Manual for the Examination and Processing of Human Semen, Sixth Edition
- American Society for Reproductive Medicine – Diagnosis and Treatment of Infertility in Men