Fertility Screening

Fertility screening is the process of checking whether factors affecting reproduction may be making it harder to conceive. In men’s health, it usually means a focused review of sperm health, hormone balance, sexual and reproductive history, physical findings, and sometimes genetic or imaging tests. Fertility screening does not always diagnose infertility on its own, but it helps identify potential problems early, guide next steps, and shorten the time to proper treatment for individuals and couples trying to build a family.

At a glance
What is fertility screening?
Why fertility screening matters
Who should consider fertility screening?
What fertility screening means for men
What tests are included?
Semen analysis and sperm testing
Hormone testing
Imaging and genetic testing
What is normal vs abnormal?
What can cause abnormal fertility screening results?
Next steps and treatment options
How to support fertility naturally
Questions to ask your doctor
Common myths
Related tests and terms
FAQs
References

At a glance

Fertility screening looks for signs that sperm production, hormone levels, sexual function, or reproductive anatomy may be affecting conception.
For men, the first-line test is often a semen analysis based on WHO laboratory guidance.
Male-factor issues contribute to infertility in a substantial share of couples, which is why both partners generally deserve evaluation.
Screening can include medical history, physical exam, semen testing, hormone blood work, ultrasound, and sometimes genetic testing.
Abnormal results do not always mean permanent infertility. Many causes are treatable or manageable.
Lifestyle factors such as smoking, obesity, heat exposure, alcohol misuse, anabolic steroids, and poor sleep can affect fertility.
If pregnancy has not happened after 12 months of regular unprotected sex, or after 6 months if the female partner is 35 or older, evaluation is usually recommended by major medical organizations such as ACOG.
Earlier screening may be appropriate if there is a history of undescended testicles, chemotherapy, varicocele, low testosterone treatment, erectile dysfunction, or prior reproductive problems.

What is fertility screening?

Fertility screening is a structured medical evaluation used to identify possible barriers to conception. People often search for it using related terms such as fertility testing, infertility workup, reproductive screening, sperm testing, fertility check, and preconception screening.

In practical terms, fertility screening can range from a simple semen analysis to a broader evaluation that includes blood tests, imaging, and specialist review. It may be done before trying to conceive, after months of unsuccessful attempts, or when a person has known risk factors for infertility.

For men, fertility screening usually focuses on whether the testes are making enough healthy sperm, whether hormones are properly signaling sperm production, whether sperm can travel through the reproductive tract, and whether sexual function allows sperm delivery. Professional guidance from the American Urological Association and the American Society for Reproductive Medicine supports a male infertility evaluation built around history, physical examination, and semen analysis.

Fertility screening vs infertility diagnosis

These terms are related but not identical.

Fertility screening looks for warning signs or contributing factors.
Infertility diagnosis means a clinician has determined that a couple or individual meets criteria for infertility or has a defined cause.

That distinction matters because screening is often the first step, not the final answer.

Why fertility screening matters

Fertility screening matters because reproductive problems are common, often time-sensitive, and frequently misunderstood. A couple may assume the issue must be on one side, but male factors are involved in many infertility cases. According to the NICHD, male infertility can play a role either alone or along with female factors.

Early screening can help:

Identify low sperm count, poor sperm motility, abnormal sperm morphology, or absent sperm
Detect hormonal problems involving testosterone, FSH, LH, prolactin, or thyroid function
Find treatable conditions such as varicocele, infection, ejaculatory disorders, or medication-related suppression
Reveal when specialist care, sperm freezing, assisted reproductive technology, or genetic counseling may be appropriate
Reduce months of uncertainty and improve planning

It can also matter for broader health. In some men, infertility is associated with hormonal disease, genetic conditions, varicocele, prior infections, and even general health risks. A fertility workup can uncover issues that deserve medical attention beyond conception alone.

Who should consider fertility screening?

Not everyone needs the same level of evaluation, but screening is especially relevant for:

Couples who have been trying to conceive without success
Men with a history of low sperm count or abnormal semen analysis
Anyone with undescended testicles, testicular injury, torsion, or prior groin surgery
Men with mumps orchitis, sexually transmitted infections, or recurrent genital infections
Those using or who previously used testosterone therapy or anabolic steroids, which can suppress sperm production according to the AUA testosterone deficiency guidance
People exposed to chemotherapy, radiation, environmental toxins, or high workplace heat
Men with erectile dysfunction, ejaculation problems, or very low libido
Those with a known varicocele, small testicles, or signs of low testosterone
People who want preconception information before delaying parenthood

When to seek help

If pregnancy has not occurred after 12 months of regular unprotected intercourse
After 6 months if the female partner is 35 or older
Sooner if there are known male or female reproductive risk factors

This timing is consistent with guidance from ACOG and fertility societies.

What fertility screening means for men

In men’s health, fertility screening is not just “checking testosterone.” That is a common misconception. A man can have normal testosterone and still have significant sperm problems, and low testosterone treatment can sometimes reduce or stop sperm production.

A proper male fertility screening usually asks four main questions:

Is the body making sperm?
Are enough sperm reaching the semen?
Are the sperm moving and shaped well enough to support fertilization?
Are hormones, anatomy, or sexual function interfering with conception?

The evaluation often begins with a detailed history. A clinician may ask about timing of intercourse, prior pregnancies, puberty, surgeries, infections, medications, hot tub use, cannabis or tobacco, sleep, exercise, occupational exposures, and family history. A physical exam may look for testicular size, varicocele, absence of the vas deferens, body hair pattern, or signs of endocrine disease.

What tests are included?

The exact set of tests depends on symptoms, history, and whether you are screening proactively or being evaluated for infertility.

Common parts of fertility screening

Medical and reproductive history
Physical examination
Semen analysis
Repeat semen analysis if the first result is abnormal
Hormone blood tests
Scrotal or transrectal ultrasound in select cases
Genetic testing in men with very low sperm counts or azoospermia
Post-ejaculatory urinalysis if retrograde ejaculation is suspected
Infectious testing when clinically indicated

Fertility screening test overview

Test	What it looks at	Why it matters
Semen analysis	Semen volume, sperm concentration, total sperm number, motility, morphology	Core test for male fertility potential
FSH, LH, testosterone	Hormonal signaling between brain and testes	Helps identify testicular failure or endocrine causes
Prolactin, estradiol, thyroid tests	Additional hormone issues	Useful when libido, erectile symptoms, or hormonal imbalance are suspected
Scrotal ultrasound	Varicocele, testicular structure, masses	Clarifies anatomy when exam or symptoms suggest a problem
Transrectal ultrasound	Ejaculatory ducts, seminal vesicles	Can help in suspected obstruction
Genetic testing	Karyotype, Y-chromosome microdeletions, CFTR variants	Important in severe sperm deficiency or absent sperm

Semen analysis and sperm testing

Semen analysis is the cornerstone of male fertility screening. It evaluates the fluid released during ejaculation and the sperm within it. WHO manuals provide standardized laboratory methods for testing and interpretation, though results always need clinical context.

A semen analysis typically measures:

Volume: how much semen is ejaculated
Sperm concentration: how many sperm are present per milliliter
Total sperm number: total sperm in the entire ejaculate
Motility: how well sperm move
Morphology: the percentage of sperm with typical shape
Vitality: the percentage of live sperm when motility is low
pH and white blood cells: clues about obstruction or inflammation

How a semen sample is usually collected

Abstain from ejaculation for the lab’s recommended window, often 2 to 7 days.
Collect the sample exactly as instructed, usually by masturbation into a sterile container.
Deliver it to the lab within the recommended time frame if collected at home.
Repeat testing if the result is abnormal, because semen parameters naturally fluctuate.

Guidelines commonly recommend at least two semen analyses when there is concern, because illness, stress, fever, collection problems, and timing can temporarily affect the result.

Semen analysis reference values

The table below summarizes commonly cited lower reference limits from WHO laboratory guidance. These are not strict pass-fail cutoffs for fertility, but they are widely used benchmarks.

Parameter	Common lower reference value	Why it matters
Semen volume	1.4 mL	Low volume can suggest collection issues, androgen deficiency, or duct obstruction
Sperm concentration	16 million/mL	Lower counts reduce the chance of sperm reaching the egg
Total sperm number	39 million per ejaculate	Reflects total sperm output
Total motility	42%	Movement is necessary for natural conception
Progressive motility	30%	Forward movement matters most
Normal morphology	4%	Shape alone does not determine fertility, but severe abnormalities can matter

These values are based on the WHO Laboratory Manual for the Examination and Processing of Human Semen.

What abnormal semen results can mean

Oligozoospermia: low sperm concentration
Asthenozoospermia: poor sperm motility
Teratozoospermia: lower percentage of sperm with typical shape
Azoospermia: no sperm seen in the ejaculate
Hypospermia: low semen volume

One abnormal result does not tell the whole story. Some men with mildly abnormal values can still conceive naturally, while others with “normal” values may still have fertility problems due to DNA fragmentation, timing, female factors, or unexplained infertility.

Hormone testing

Hormone testing is often part of fertility screening when semen parameters are abnormal or when symptoms suggest an endocrine problem. Blood work may include:

Total testosterone
Follicle-stimulating hormone (FSH)
Luteinizing hormone (LH)
Prolactin
Estradiol
TSH or other thyroid tests

FSH is especially useful because it helps reflect how strongly the brain is signaling the testes to make sperm. High FSH with very low sperm production can suggest primary testicular dysfunction. Low FSH and low LH may point toward secondary hypogonadism, where signaling from the brain is impaired.

Interpretation is nuanced. Testosterone levels vary by time of day, illness, sleep, body weight, and lab method, which is why endocrine results should be interpreted by a qualified clinician. The Endocrine Society and AUA both emphasize careful testosterone evaluation rather than relying on symptoms alone.

Imaging and genetic testing

Some men need a more advanced fertility workup.

Imaging

Scrotal ultrasound may be used to evaluate varicocele, testicular masses, or structural abnormalities.
Transrectal ultrasound can help assess ejaculatory duct obstruction or seminal vesicle abnormalities in men with low-volume semen or suspected blockage.

Genetic testing

Genetic testing becomes more important in severe oligospermia or azoospermia. Depending on the case, clinicians may order:

Karyotype testing to look for chromosomal conditions such as Klinefelter syndrome
Y-chromosome microdeletion testing in severe sperm deficiency
CFTR mutation testing in men with congenital bilateral absence of the vas deferens, which can be associated with cystic fibrosis-related gene variants

The AUA/ASRM male infertility guideline outlines when these tests are most appropriate.

What is normal vs abnormal?

Many people want a simple answer: is my fertility screening normal or not? The reality is more layered.

What is generally reassuring

Normal semen volume and sperm concentration
Good progressive motility
No severe morphology issues
Normal testicular exam
Hormone levels that fit the clinical picture
No symptoms of obstruction, erectile dysfunction, or ejaculation problems

What is generally concerning

No sperm in the semen
Very low sperm count or very poor motility
Persistently low semen volume
High FSH with small testicles
Low testosterone with low or inappropriately normal gonadotropins
Blood in semen, testicular mass, or significant pain
Known reproductive tract obstruction or prior vasectomy

Screening interpretation table

Finding	Possible meaning	Typical next step
Low sperm concentration	Reduced sperm production, heat, hormones, varicocele, toxins, illness	Repeat semen analysis, hormone testing, lifestyle review
No sperm in ejaculate	Obstruction or severe production problem	Urgent specialist evaluation, hormones, genetic testing
Low semen volume	Collection issue, low androgens, retrograde ejaculation, obstruction	Repeat sample, review abstinence and collection, consider further testing
Poor motility	Varicocele, fever, oxidative stress, lab variation, sperm dysfunction	Repeat test and assess contributing factors
High FSH	Possible testicular dysfunction	Specialist review with semen findings
Low testosterone	Endocrine dysfunction, obesity, sleep apnea, pituitary causes, medication effects	Confirm morning testing and broader endocrine evaluation

Importantly, fertility exists on a spectrum. There is no single semen or hormone number that guarantees conception.

What can cause abnormal fertility screening results?

Abnormal fertility screening results can stem from many different factors, and multiple causes may overlap.

Common male fertility factors

Varicocele: enlarged veins around the testicle, a common reversible finding in some infertile men
Hormonal disorders: hypogonadism, pituitary disorders, thyroid disease, high prolactin
Genetic causes: chromosomal differences or Y-chromosome microdeletions
Obstruction: blockage in the epididymis, vas deferens, or ejaculatory ducts
Testicular damage: prior torsion, trauma, mumps orchitis, chemotherapy, radiation
Medications and substances: testosterone therapy, anabolic steroids, opioids, some chemotherapy drugs, excessive alcohol, tobacco, cannabis
Lifestyle and environment: obesity, sleep problems, chronic stress, high heat exposure, pesticides, industrial chemicals
Sexual function issues: erectile dysfunction, delayed ejaculation, retrograde ejaculation

Fever and recent illness can also temporarily lower semen quality. Because sperm development takes roughly 2 to 3 months, today’s test can reflect exposures or health events from several weeks earlier.

Evidence also suggests that smoking, obesity, and certain environmental exposures are associated with worse semen parameters, although the size of effect varies between studies. A broad review in Human Reproduction Update on lifestyle and male infertility summarizes these relationships.

Next steps and treatment options

Treatment depends on what screening finds. Some men need only repeat testing and timing guidance. Others may benefit from medication, surgery, or assisted reproductive technology.

Possible next steps after fertility screening

Repeat semen analysis to confirm a true abnormal pattern
Correct reversible factors such as testosterone use, anabolic steroids, smoking, alcohol excess, poor sleep, or high heat exposure
Treat hormonal causes when clinically appropriate
Evaluate and manage varicocele in selected cases
Treat sexual dysfunction if erection or ejaculation issues are limiting conception
Consider sperm retrieval or assisted reproduction when sperm are absent or natural conception is unlikely
Pursue genetic counseling when inherited conditions may be involved

Treatment options by cause

Cause	Potential treatment	Notes
Varicocele	Observation or varicocele repair	Best choice depends on semen results, exam, and couple context
Secondary hypogonadism	Cause-specific endocrine management	Exogenous testosterone is generally avoided when fertility is desired
Obstruction	Microsurgical repair or sperm retrieval	May allow natural conception or IVF/ICSI
Retrograde ejaculation	Medication or sperm recovery techniques	Depends on underlying cause
Severe sperm deficiency	IVF with ICSI, possible sperm retrieval	Often coordinated with fertility specialists
Lifestyle-related impairment	Behavior changes and risk reduction	Improvement may take several months

The American Society for Reproductive Medicine provides patient-centered information on infertility treatment options, including intrauterine insemination and IVF.

How to support fertility naturally

No lifestyle change guarantees pregnancy, but several habits are consistently associated with better reproductive health and may improve semen quality over time.

Evidence-based habits that may help

Maintain a healthy body weight
Stop smoking and avoid nicotine products
Limit heavy alcohol use
Avoid anabolic steroids and do not start testosterone therapy if trying to conceive without discussing fertility impact
Get enough sleep and address possible sleep apnea
Exercise regularly without extreme overtraining
Manage chronic conditions such as diabetes and thyroid disease
Reduce high heat exposure from frequent hot tubs, saunas, or prolonged laptop heat on the groin
Prioritize a nutrient-dense eating pattern rich in fruits, vegetables, whole grains, legumes, fish, and unsaturated fats

Some supplements are marketed heavily for sperm health, but evidence is mixed. Antioxidants may help some men, yet results across studies are inconsistent. That means supplements should not replace proper evaluation of a medical cause.

How long does it take to see changes?

Because sperm development takes around 74 days, plus transport time, meaningful improvement usually takes a few months rather than a few days. If you are making changes after an abnormal screening result, retesting is often timed accordingly.

Questions to ask your doctor

If you are reviewing fertility screening results, these questions can help make the conversation more productive:

What part of my screening looks normal, and what part does not?
Do I need a repeat semen analysis?
Should I have hormone testing, ultrasound, or genetic testing?
Could any of my medications or supplements be affecting fertility?
Is testosterone therapy or prior steroid use part of the problem?
Do my results suggest a blockage, hormonal issue, or sperm production problem?
What lifestyle changes are most likely to help in my case?
Should my partner be evaluated at the same time?
Do I need a reproductive urologist or fertility specialist?
What timeline makes sense before repeating tests or considering treatment?

Common myths

Myth 1: Fertility screening is only for women

False. Male factors are a common part of infertility, and evaluating both partners is often the most efficient approach.

Myth 2: A normal testosterone level means normal fertility

False. Testosterone and sperm production are related but not interchangeable. A man can have normal testosterone and abnormal sperm findings.

Myth 3: One semen analysis gives a final answer

False. Semen values fluctuate, which is why repeat testing is often needed.

Myth 4: If sperm count is low, natural conception is impossible

False. The chance may be lower, but pregnancy can still happen depending on the degree of abnormality and other factors.

Myth 5: Fertility problems always cause symptoms

False. Many men with abnormal semen results feel completely healthy and have no obvious symptoms.

Semen analysis: lab test evaluating sperm and semen
Azoospermia: no sperm in ejaculate
Oligozoospermia: low sperm concentration
Asthenozoospermia: low sperm motility
Teratozoospermia: abnormal sperm morphology pattern
Varicocele: enlarged scrotal veins that can affect sperm health
FSH and LH: pituitary hormones involved in sperm production signaling
Hypogonadism: reduced testicular hormone function
ICSI: intracytoplasmic sperm injection, a lab technique used during IVF
Sperm DNA fragmentation: specialized testing sometimes considered in selected cases

FAQs

How is fertility screening done for a man?

It usually starts with a medical history, physical exam, and semen analysis. Depending on the results, a doctor may add hormone tests, ultrasound, or genetic testing.

What is the first test in male fertility screening?

In most cases, the first and most important lab test is a semen analysis, because it directly measures sperm quantity and quality.

Can I do fertility screening before trying for a baby?

Yes. Preconception fertility screening can be useful if you have risk factors such as prior testosterone use, testicular surgery, chemotherapy, varicocele, or simply want early information.

Does a normal semen analysis mean I am definitely fertile?

No. Normal results are reassuring, but they do not guarantee pregnancy. Fertility also depends on timing, partner factors, sperm function, and other health issues.

What if my fertility screening is abnormal?

An abnormal result does not automatically mean you cannot have children. Many abnormalities are temporary, treatable, or manageable with specialist care or assisted reproduction.

Can testosterone therapy affect fertility screening results?

Yes. Testosterone therapy can suppress the brain signals needed for sperm production and may significantly lower sperm count or cause azoospermia.

How long should I abstain before a semen analysis?

Most labs recommend 2 to 7 days of abstinence before collection, but you should follow your lab’s exact instructions.

How much does lifestyle really matter for fertility?

It can matter quite a bit. Smoking, obesity, sleep problems, heavy alcohol use, anabolic steroids, and heat exposure can all negatively affect sperm health in some men.

When should I see a fertility specialist instead of a general doctor?

You should consider specialist care sooner if you have no sperm in semen, very low counts, abnormal hormone tests, a known varicocele, prior chemotherapy, undescended testes, or prolonged difficulty conceiving.