Fertility screening

Fertility screening at a glance

• Definition: A set of tests and evaluations used to look for causes of difficulty conceiving.
• For men, the first-line test is usually: A semen analysis.
• It does not provide a simple yes/no answer: Fertility exists on a spectrum, and results need clinical context.
• Male fertility screening may include: Semen testing, hormone labs, physical exam, ultrasound, and genetic testing when indicated.
• Normal results do not guarantee pregnancy: They suggest no obvious male factor on initial testing, but fertility can still be affected by both partners and timing.
• Abnormal results are common and often manageable: Lifestyle changes, medical treatment, surgery, or assisted reproductive techniques may help.
• When to seek evaluation: Usually after 12 months of trying if the female partner is under 35, or after 6 months if she is 35 or older; sooner if there are known risk factors.

What is fertility screening?

Fertility screening is an early evaluation used to assess reproductive health and identify reasons pregnancy may not be happening. It is sometimes called a fertility workup, fertility testing, or infertility evaluation. In practical terms, it means looking at the main ingredients needed for conception and seeing whether anything is interfering.

For men, fertility screening is not limited to sperm count. It can also look at sperm movement, sperm shape, semen volume, hormone balance, testicular function, ducts and anatomy, sexual function, genetic conditions, and health habits that may affect sperm production.

For couples, fertility screening is most useful when both partners are evaluated. Infertility is a shared clinical issue, not just a male or female one.

What does fertility screening include for men?

Male fertility screening usually starts with a detailed history and one or more semen analyses. Depending on the findings, a clinician may recommend additional tests.

Typical parts of male fertility screening

1. Medical and reproductive history
   Questions about how long you have been trying, prior pregnancies, surgeries, puberty, infections, medications, testosterone use, anabolic steroids, heat exposure, and family history.
2. Sexual history
   Frequency and timing of intercourse, erectile dysfunction, ejaculation concerns, low libido, pain, or retrograde ejaculation symptoms.
3. Physical exam
   Assessment of the testes, penis, scrotum, varicocele, body hair pattern, breast tissue, and signs of hormone imbalance or developmental issues.
4. Semen analysis
   The core screening test for male fertility. It analyzes the semen sample for volume, concentration, total sperm number, motility, morphology, and other features.
5. Hormone testing
   Often includes FSH, LH, total testosterone, prolactin, and sometimes estradiol or thyroid tests.
6. Scrotal or transrectal ultrasound
   Used if a varicocele, obstruction, testicular abnormality, or ejaculatory duct issue is suspected.
7. Genetic testing
   May be recommended for very low sperm counts, no sperm in the ejaculate, or findings that suggest a genetic cause.
8. Specialized sperm testing
   In some cases, clinicians may consider sperm DNA fragmentation or antisperm antibody testing, although these are not first-line tests for everyone.

Who should consider fertility screening?

Fertility screening may be appropriate for men, women, or couples in several situations.

• You have been trying to conceive for 12 months without pregnancy, if the female partner is under 35.
• You have been trying for 6 months without pregnancy, if the female partner is 35 or older.
• There is a history of undescended testicles, testicular surgery, torsion, mumps orchitis, or chemotherapy.
• You have known low testosterone, pituitary issues, or prior testosterone replacement therapy or anabolic steroid use.
• You have erection or ejaculation problems.
• You have had a vasectomy reversal or prior genital surgery.
• There is concern for a varicocele, scrotal pain, or a large difference in testicular size.
• You have a history of sexually transmitted infection or other reproductive tract infection.
• You want a proactive check before trying for pregnancy, especially if age, health conditions, or exposures are concerns.

Why fertility screening matters

Many people assume fertility problems are obvious, but they often are not. A man can feel healthy, have normal sexual function, and still have sperm parameters that make conception more difficult. Fertility screening matters because it can:

• Identify treatable causes of low fertility potential
• Reduce delays in finding the right treatment path
• Reveal health issues beyond fertility, such as hormone disorders or genetic conditions
• Help couples make informed decisions about timing and reproductive options
• Provide a baseline if lifestyle changes or treatment are started

It is also important to understand that fertility screening is about probabilities, not guarantees. Even men with “normal” semen analysis results can have trouble conceiving, and men with abnormal results may still achieve pregnancy naturally or with support.

Common fertility screening tests

Semen analysis

A semen analysis is the most common screening test for male fertility. It evaluates both the fluid and the sperm cells in the ejaculate.

Because sperm production changes over time, one abnormal semen analysis is not always enough to diagnose a long-term problem. A repeat test is often recommended, usually after several weeks, depending on the situation.

Hormone testing

Hormones help control sperm production. Blood tests may include:

• FSH: Can provide clues about how the testes are functioning
• LH: Helps assess signaling between the brain and testes
• Total testosterone: Important for sperm production and sexual health
• Prolactin: Elevated levels can affect hormone balance and libido
• Estradiol: Sometimes useful when obesity, hormonal imbalance, or gynecomastia is present
• Thyroid tests: Considered when symptoms or history suggest thyroid disease

Imaging

Ultrasound may be used to look for:

• Varicocele
• Testicular masses
• Blockages or ejaculatory duct obstruction
• Congenital abnormalities of the vas deferens or reproductive tract

Genetic testing

Genetic screening can be especially important in severe male factor infertility. It may include:

• Karyotype testing for chromosome abnormalities
• Y chromosome microdeletion testing in men with severely impaired sperm production
• CFTR gene testing in some men with absent vas deferens or suspected obstructive azoospermia

Other tests that may be used selectively

• Post-ejaculate urinalysis for suspected retrograde ejaculation
• Infection testing if symptoms or lab findings suggest infection
• Sperm DNA fragmentation testing in selected cases such as recurrent pregnancy loss, repeated IVF failure, or unexplained infertility
• Testicular biopsy in highly specific scenarios

What’s normal vs. what’s not?

Fertility screening results need interpretation by a qualified clinician, but some broad principles can help.

One key point: reference ranges are not perfect dividing lines between fertile and infertile. A result can be slightly below range and still be compatible with conception, while a “normal” report does not guarantee fast pregnancy.

Terms you may see on a semen report

• Oligozoospermia: Low sperm concentration
• Asthenozoospermia: Reduced sperm motility
• Teratozoospermia: Lower-than-expected percentage of normally shaped sperm
• Azoospermia: No sperm seen in the ejaculate
• Necrozoospermia: A high proportion of nonviable sperm
• Leukocytospermia: Elevated white blood cells in semen

What abnormal fertility screening results may mean

Abnormal results do not all mean the same thing. They may point to temporary issues, chronic conditions, or findings with uncertain significance.

Possible causes of abnormal male fertility screening

• Hormonal problems: Low testosterone, pituitary disorders, thyroid disease, elevated prolactin
• Varicocele: Enlarged veins in the scrotum that may affect sperm production or quality
• Obstruction: A blockage in the epididymis, vas deferens, or ejaculatory ducts
• Genetic causes: Chromosomal differences or gene-related reproductive conditions
• Heat and environmental exposure: Frequent sauna or hot tub use, high-heat jobs, toxins
• Medication effects: Testosterone therapy, anabolic steroids, some chemotherapy drugs, certain medications with reproductive side effects
• Lifestyle factors: Smoking, excessive alcohol, cannabis, poor sleep, obesity, severe stress
• Infection or inflammation: Which may affect semen quality or reproductive tract function
• Age-related changes: Male fertility does not stop abruptly, but age can affect sperm quality and DNA integrity

Temporary causes of a poor semen analysis

Sperm production takes roughly 2 to 3 months. Because of that, test results may be affected by things that happened weeks earlier, such as:

• Recent fever or viral illness
• Acute stress or sleep disruption
• Heavy alcohol use
• Heat exposure
• Recent medication changes
• Improper sample collection

This is one reason repeat testing is common before drawing conclusions.

Fertility screening in couples

Even though this term often brings up semen testing, fertility screening ideally looks at both partners. A couple may have one contributing factor, several mild factors, or unexplained infertility even after standard testing.

If you are trying to conceive, evaluating only one partner can lead to missed information and unnecessary delays.

How to prepare for fertility screening

Preparation depends on which tests you are having, but a few steps can improve accuracy and make the process smoother.

Before a semen analysis

1. Follow the lab’s instructions for abstinence, commonly about 2 to 7 days before collection.
2. Avoid using lubricants unless the lab specifically says they are acceptable.
3. Collect the entire sample, since missing the first part can affect the result.
4. Tell the clinician about recent fever, illness, travel, medication changes, testosterone use, or supplements.
5. Deliver the sample within the time window required by the lab if collected at home.

Before hormone testing or specialist evaluation

• Bring a list of medications, supplements, and hormone therapies
• Be ready to discuss prior pregnancies, surgeries, and sexual symptoms
• Share any relevant family history, including infertility or genetic disorders
• Ask whether blood testing should be done in the morning, especially for testosterone

How to support fertility naturally

Not every fertility issue can be solved with lifestyle changes, but habits do matter. In men, sperm quality often improves gradually over weeks to months after healthier changes are made.

Evidence-based steps that may support male fertility

• Stop smoking and avoid nicotine exposure
• Limit alcohol, especially heavy or binge drinking
• Avoid anabolic steroids and non-prescribed testosterone, which can significantly suppress sperm production
• Maintain a healthy weight if possible
• Exercise regularly without overtraining
• Prioritize sleep and manage chronic stress
• Reduce excessive heat exposure from frequent hot tubs, saunas, or prolonged laptop heat on the lap
• Review medications with a clinician if fertility is a goal
• Address chronic health conditions such as diabetes, thyroid disease, or sleep apnea
• Eat a nutrient-dense diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats

Supplements are a common area of interest, but they should not replace proper screening. Some may help selected individuals, but evidence is mixed and product quality varies. Men with infertility concerns should discuss supplements with a clinician rather than relying on marketing claims.

Medical treatment options if screening finds a problem

• Treating hormone disorders when appropriate
• Surgery for a clinically significant varicocele in selected cases
• Treatment for infections or inflammation when indicated
• Management of erectile or ejaculation problems
• Reproductive urology evaluation for azoospermia or severe male factor infertility
• Assisted reproductive techniques such as IUI, IVF, or ICSI when needed

Related tests and terms

• Semen analysis: The primary lab test used in male fertility screening
• Sperm count: One piece of the semen analysis, but not the whole picture
• Sperm motility: How effectively sperm move
• Sperm morphology: The shape and structure of sperm
• Testosterone: A hormone relevant to male reproductive and sexual health
• FSH and LH: Hormones involved in sperm production signaling
• Varicocele: Enlarged scrotal veins linked to male infertility in some men
• Azoospermia: No sperm in the ejaculate
• Sperm DNA fragmentation: A specialized test considered in selected infertility cases
• Infertility evaluation: A broader term that includes fertility screening and follow-up diagnostics

When to see a doctor

You should consider a medical evaluation if:

• You have been trying to conceive without success for the recommended time based on age
• You have had prior cancer treatment, testosterone therapy, genital surgery, or undescended testicles
• You notice low libido, erectile dysfunction, ejaculation changes, or reduced testicular size
• You have a history of recurrent miscarriage with a partner
• You have no sperm or very low sperm on a home or lab test
• You want preconception counseling and have risk factors for infertility

Red-flag symptoms such as a testicular mass, severe pain, or sudden swelling should be assessed promptly.

Questions to ask your doctor about fertility screening

• Which fertility screening tests do you recommend for me, and why?
• Do I need more than one semen analysis?
• Could any of my medications, supplements, or hormone treatments be affecting fertility?
• Should I see a reproductive urologist?
• Would hormone testing or genetic testing be useful in my case?
• Are my results mildly abnormal or strongly suggestive of a problem?
• What changes can I make now that might improve my chances of conception?
• How long should we try before moving to treatment options like IUI or IVF?

Common myths about fertility screening

Myth: If I can get an erection and ejaculate, I must be fertile.

Reality: Sexual function and fertility are related but not the same. A man can have normal erections and ejaculation with abnormal sperm parameters.

Myth: Fertility screening is only for women.

Reality: Male factors are common in infertility, and semen testing is one of the most important early evaluations.

Myth: One semen analysis gives a complete answer.

Reality: Results can vary. Repeat testing and clinical context often matter.

Myth: A normal semen analysis guarantees pregnancy.

Reality: It is reassuring, but pregnancy depends on many factors, including the female partner, timing, and sometimes issues not captured on routine testing.

Myth: Fertility screening is only necessary after years of trying.

Reality: Some couples should seek evaluation earlier, especially when age or known risk factors are present.

Frequently asked questions

What is fertility screening in simple terms?

Fertility screening is a set of tests used to look for reasons a person or couple may be having trouble getting pregnant. In men, it usually starts with a semen analysis.

How is male fertility screened?

Male fertility screening commonly includes a medical history, physical exam, semen analysis, and sometimes hormone tests, ultrasound, or genetic testing depending on the results.

Can fertility screening tell me if I am infertile?

It can identify signs of subfertility or infertility, but it rarely gives a simple yes-or-no answer. Fertility is best understood as a combination of test results, timing, partner factors, and clinical history.

Do I need a semen analysis if I feel healthy?

Possibly. Many men with fertility problems feel completely well and have no obvious symptoms. A semen analysis is often the best starting point when conception is delayed.

How accurate is fertility screening?

It is useful, but no single test is perfect. Semen parameters can fluctuate, and some fertility problems are not captured on routine screening. That is why repeat testing or specialist follow-up may be needed.

How long should I abstain before a semen analysis?

Many labs recommend 2 to 7 days of abstinence before collection, but you should follow the specific instructions from your laboratory or clinician.

What if my fertility screening comes back abnormal?

Abnormal results often lead to repeat testing or further evaluation. Depending on the cause, treatment may involve lifestyle changes, medication, surgery, or fertility treatment such as IUI or IVF.

Should both partners get fertility screening?

Yes, in most cases. Infertility is often a couple-level issue, and evaluating both partners usually leads to a clearer and faster plan.

Can testosterone therapy affect fertility screening results?

Yes. Testosterone replacement therapy and anabolic steroids can suppress sperm production and significantly affect male fertility. Men trying to conceive should discuss this with a clinician before using or stopping treatment.

Can I improve my fertility before testing?

You can support sperm health by avoiding smoking and steroids, limiting alcohol, sleeping well, managing weight, and reducing heat exposure. Still, testing is important because lifestyle changes alone may not address the underlying cause.

References

• American Urological Association (AUA) and American Society for Reproductive Medicine (ASRM). Guidelines on the diagnosis and treatment of infertility in men.
• World Health Organization. WHO Laboratory Manual for the Examination and Processing of Human Semen.
• American Society for Reproductive Medicine (ASRM). Patient guidance and committee opinions on fertility evaluation and male infertility.
• European Association of Urology (EAU). Guidelines on Sexual and Reproductive Health.
• National Institute of Child Health and Human Development (NICHD). Infertility and reproductive health resources.
• Centers for Disease Control and Prevention (CDC). Infertility and assisted reproductive technology resources.
• Mayo Clinic. Male infertility overview and diagnostic approach.