Andrology
Andrology is the branch of medicine focused on male reproductive health, sexual function, hormones, and fertility. It is often described as the male counterpart to gynecology, although andrology spans more than fertility alone. An andrologist may evaluate issues such as low testosterone, erectile dysfunction, low sperm count, testicular pain, varicocele, ejaculation problems, male infertility, and other conditions affecting the penis, testes, prostate, and hormonal health.
For men trying to conceive, dealing with sexual symptoms, or trying to understand semen analysis or hormone results, andrology matters because it connects symptoms, lab testing, and treatment options in one specialty. It can also help identify broader health issues. Problems in sperm quality, testosterone levels, or sexual function sometimes reflect underlying endocrine, metabolic, genetic, or vascular conditions.
Andrology at a glance
- Definition: Andrology is the medical field focused on male reproductive and sexual health.
- Main areas: Fertility, sperm health, testosterone and hormones, erectile dysfunction, ejaculation disorders, and testicular conditions.
- Who it helps: Men with fertility concerns, sexual symptoms, hormone issues, genital symptoms, or abnormal reproductive test results.
- Common tests: Semen analysis, testosterone testing, LH, FSH, prolactin, estradiol, genetic testing, scrotal ultrasound, and physical exam.
- Why it matters: Male-factor issues contribute to a substantial share of infertility and may also signal underlying health problems.
- Specialists involved: Andrologists are often urologists with a focus on male reproductive medicine and surgery.
- Treatment options: Lifestyle changes, medication, hormone-directed treatment, varicocele repair, sperm retrieval, and assisted reproductive techniques.
What is andrology?
Andrology is a medical specialty devoted to the diagnosis, treatment, and management of conditions affecting the male reproductive system and related sexual health. The term comes from the Greek word for “man,” and in modern practice it generally refers to clinician expertise in areas such as:
- Male infertility
- Sperm production and semen quality
- Testosterone deficiency and other hormone disorders
- Erectile dysfunction
- Low libido
- Ejaculatory disorders
- Varicocele
- Testicular and scrotal problems
- Peyronie’s disease
- Vasectomy and vasectomy reversal
In practical terms, andrology sits at the intersection of urology, endocrinology, fertility medicine, and sexual medicine. Some clinics use the term broadly to describe any advanced care involving male reproductive health. Others use it more specifically for fertility and sexual function.
What does an andrologist treat?
An andrologist is a doctor with expertise in male reproductive and sexual health. In many health systems, andrologists are urologists with fellowship or advanced experience in male infertility, microsurgery, sexual medicine, or hormone-related male health issues.
Common conditions and concerns seen in andrology include:
| Area | Examples of conditions or concerns |
|---|---|
| Fertility | Low sperm count, poor motility, abnormal morphology, azoospermia, recurrent miscarriage evaluation, infertility workup |
| Hormonal health | Low testosterone, pituitary-related hormone issues, elevated prolactin, delayed puberty, hypogonadism |
| Sexual function | Erectile dysfunction, low libido, premature ejaculation, delayed ejaculation, painful ejaculation |
| Scrotal and testicular health | Varicocele, hydrocele, testicular pain, testicular atrophy, undescended testis history |
| Penile health | Peyronie’s disease, penile curvature, penile pain, structural concerns |
| Reproductive procedures | Vasectomy, vasectomy reversal, sperm retrieval, microsurgical procedures |
Not every man with these symptoms needs an andrologist specifically, but the specialty becomes especially relevant when fertility, complex hormone questions, or male sexual function are central to the problem.
Why andrology matters for men’s health and fertility
Andrology is important because male reproductive health is often under-evaluated, even though it can affect conception, sexual well-being, quality of life, and general health. A semen problem, low testosterone, or erectile dysfunction is not always just a stand-alone issue. It may be linked to:
- Hormonal imbalance
- Varicocele or obstruction
- Medication side effects
- Obesity or insulin resistance
- Sleep apnea
- Smoking, alcohol, cannabis, or anabolic steroid use
- Genetic conditions
- Thyroid or pituitary disease
- Cardiovascular risk factors
For couples trying to conceive, a male evaluation is often essential. Male factors contribute to infertility alone or in combination with female factors in a large share of cases. A focused andrology workup can uncover treatable contributors and help avoid unnecessary delay.
Andrology also matters because many men seek help late. Symptoms like low energy, erection changes, reduced libido, or difficulty conceiving may be brushed off for months or years. Early assessment can clarify what is normal variation, what needs follow-up, and what can be improved.
Common symptoms and reasons men seek andrology care
Men may be referred to or search for andrology care for a wide range of symptoms and test results. Common reasons include:
- Trouble conceiving after 12 months of trying, or after 6 months if the female partner is 35 or older
- Abnormal semen analysis
- Low sperm count or no sperm seen in semen
- Erectile dysfunction or weaker erections
- Low libido or reduced sexual desire
- Premature ejaculation or delayed ejaculation
- Low testosterone symptoms such as fatigue, reduced muscle mass, low mood, or decreased morning erections
- Scrotal swelling, heaviness, or testicular pain
- Visible enlarged scrotal veins suggestive of varicocele
- History of undescended testicle, testicular torsion, mumps orchitis, pelvic surgery, chemotherapy, or testosterone/anabolic steroid use
- Planning fertility after vasectomy reversal or sperm retrieval
Some men have no obvious symptoms and are only evaluated because of infertility or an abnormal lab result. That is common. Fertility problems do not always produce noticeable day-to-day symptoms.
Tests used in andrology
An andrology evaluation usually combines medical history, physical exam, and targeted testing. The exact workup depends on the concern.
1. Medical history
A detailed history often covers:
- Time trying to conceive
- Prior pregnancies with current or past partners
- Puberty and development history
- Past surgeries, infections, trauma, or torsion
- Fever, heat exposure, or occupational exposures
- Medications, supplements, testosterone use, or anabolic steroids
- Sexual function and ejaculation
- Family history of infertility or genetic disease
- Lifestyle factors such as tobacco, alcohol, cannabis, exercise, sleep, and body weight
2. Physical examination
The exam may assess:
- Testicular size and consistency
- Presence of a varicocele
- Penile anatomy
- Signs of hormonal imbalance
- Body hair, breast tissue, and overall male secondary sexual characteristics
3. Semen analysis
Semen analysis is one of the core tests in andrology and male fertility workups. It evaluates factors such as volume, concentration, total sperm number, motility, and morphology. Because sperm results can vary, more than one test is often recommended.
4. Hormone testing
Hormone blood work may include:
- Total testosterone
- Free testosterone or calculated free testosterone
- Luteinizing hormone (LH)
- Follicle-stimulating hormone (FSH)
- Prolactin
- Estradiol
- Thyroid-stimulating hormone (TSH)
- Sex hormone-binding globulin (SHBG)
5. Imaging
Depending on the situation, imaging may include:
- Scrotal ultrasound for varicocele, testicular structure, masses, or pain
- Transrectal ultrasound if ejaculatory duct obstruction is suspected
- MRI in selected endocrine or pituitary cases
6. Genetic testing
Genetic evaluation may be recommended in certain infertility cases, especially severe oligospermia or azoospermia. Tests can include:
- Karyotype analysis
- Y chromosome microdeletion testing
- CFTR mutation testing in some men with absent vas deferens
7. Specialized sperm testing
In selected cases, a clinician may discuss advanced testing such as sperm DNA fragmentation or reproductive infection evaluation. These tests are not appropriate or necessary for every patient and should be interpreted in clinical context.
What’s normal vs what’s not?
Andrology does not rely on a single “male fertility score” or one testosterone number in isolation. Normality depends on the specific test, symptoms, timing, and clinical picture. Still, there are broad principles that help interpret results.
Semen analysis: normal vs abnormal
A semen analysis looks at multiple measures. A result outside reference ranges does not always mean infertility, and a “normal” semen analysis does not guarantee fertility. It is a useful tool, not a complete answer.
| Parameter | What it generally reflects | Why an abnormal result may matter |
|---|---|---|
| Semen volume | Fluid contribution from reproductive glands and ejaculatory function | Low volume may suggest collection issues, retrograde ejaculation, androgen problems, or obstruction |
| Sperm concentration | Number of sperm per mL | Low concentration can reduce the chance of natural conception |
| Total sperm number | Total sperm in the ejaculate | Provides additional context beyond concentration alone |
| Motility | How well sperm move | Poor motility can make it harder for sperm to reach and fertilize the egg |
| Morphology | Sperm shape | Abnormal morphology may be one piece of the fertility picture, but is rarely interpreted alone |
Testosterone: normal vs abnormal
Testosterone interpretation is more nuanced than many online searches suggest. Levels vary by lab, time of day, age, body composition, sleep, and illness. Most guidelines emphasize that symptoms and properly timed testing matter as much as the absolute number.
- Testosterone should usually be checked in the morning, especially in younger men.
- Abnormal results are often confirmed with repeat testing.
- Total testosterone may need to be interpreted alongside SHBG and free testosterone.
- LH and FSH help determine whether the cause appears testicular or central (pituitary/hypothalamic).
A single low or borderline value should not be overinterpreted without context.
Andrology vs urology: what’s the difference?
People often search for andrology vs urology because the fields overlap. Urology is the broader surgical and medical specialty dealing with the urinary tract and male reproductive organs. Andrology is a more focused area within or alongside urology that concentrates on male sexual and reproductive health.
| Specialty | Main focus | Typical issues addressed |
|---|---|---|
| Urology | Urinary tract and male genitourinary system | Kidney stones, urinary symptoms, prostate enlargement, bladder issues, cancers, and some male reproductive conditions |
| Andrology | Male reproductive health, fertility, sexual function, and hormones | Male infertility, ED, low testosterone, varicocele, ejaculation disorders, sperm retrieval, vasectomy reversal |
In many clinics, the same physician may have training in both. If your main concern is fertility, sperm quality, low testosterone, or complex sexual dysfunction, finding someone with specific andrology expertise can be especially helpful.
Andrology and male fertility
Male fertility is one of the core pillars of andrology. Fertility problems can result from issues with sperm production, sperm transport, ejaculation, hormones, anatomy, genetics, or lifestyle exposures.
Common fertility-related conditions in andrology
- Oligospermia: low sperm count
- Azoospermia: no sperm seen in the ejaculate
- Asthenozoospermia: reduced sperm motility
- Teratozoospermia: abnormal sperm morphology
- Varicocele: enlarged scrotal veins that may impair sperm production in some men
- Obstructive infertility: sperm are produced but blocked from reaching the semen
- Nonobstructive infertility: impaired sperm production within the testes
- Ejaculatory dysfunction: sperm may not be delivered effectively
- Hormone-related infertility: disruptions in the hypothalamic-pituitary-gonadal axis
Why a male fertility evaluation matters early
Many couples initially focus on female testing, but parallel male evaluation often saves time. A careful andrology assessment can:
- Find treatable causes of abnormal semen parameters
- Identify hormone issues that may respond to targeted treatment
- Clarify whether surgery, medication, IVF, ICSI, or sperm retrieval may be needed
- Detect potential genetic conditions with implications for treatment and offspring
Can andrology improve sperm quality?
Sometimes, yes. Improvement depends on the cause. Sperm quality may respond to treatment of varicocele, stopping testosterone or anabolic steroids, treating endocrine disorders, correcting nutritional or lifestyle factors, addressing heat or toxin exposures, or using fertility-directed medical therapy in selected patients. Not every case is reversible, but many should be evaluated before assuming assisted reproduction is the only option.
Andrology and sexual health
Andrology is not only about fertility. It also plays a major role in male sexual medicine. Problems with erections, libido, ejaculation, penile structure, or orgasm can affect self-esteem, relationships, and overall health.
Common sexual health conditions managed in andrology
- Erectile dysfunction (ED): difficulty achieving or maintaining an erection sufficient for sex
- Low libido: reduced sexual desire, which may or may not be related to testosterone
- Premature ejaculation: ejaculation that occurs sooner than desired and causes distress
- Delayed ejaculation: persistent difficulty ejaculating
- Peyronie’s disease: plaque and curvature of the penis that may affect erections and intercourse
- Painful orgasm or ejaculation: sometimes linked to prostate, pelvic floor, or inflammatory causes
Andrology-based evaluation can help determine whether symptoms are primarily hormonal, vascular, neurologic, psychological, medication-related, structural, or mixed. That matters because treatment differs significantly by cause.
Andrology and male hormones
Hormone evaluation is a major part of andrology, especially when symptoms involve low libido, fatigue, infertility, mood changes, reduced muscle mass, or erectile changes. The goal is not simply to identify a low testosterone number. It is to understand why hormone levels are abnormal and whether treatment makes sense.
Hormones commonly considered in andrology
- Testosterone: central to sexual function, energy, muscle, and aspects of fertility physiology
- LH: signals the testes to produce testosterone
- FSH: supports sperm production
- Prolactin: elevation can suppress reproductive hormones
- Estradiol: relevant in hormone balance, especially in obesity or during certain treatments
- SHBG: affects how much testosterone is bioavailable
Important fertility caveat
One of the most important concepts in andrology is that testosterone therapy can suppress sperm production. Men who want to maintain or achieve fertility should not start testosterone without understanding this risk. In some men, fertility-preserving approaches such as treating underlying causes or using other medications may be considered instead, depending on the clinical situation.
Common treatments in andrology
Treatment in andrology depends entirely on the diagnosis. The right plan for one man may be the wrong plan for another, even if symptoms sound similar.
Medical treatments
- Medication for erectile dysfunction
- Treatment of endocrine disorders such as elevated prolactin or thyroid disease
- Selected fertility-preserving hormonal treatments in appropriate cases
- Medication or behavioral therapy for premature ejaculation
- Anti-inflammatory or supportive management when indicated for pain-related conditions
Surgical or procedural treatments
- Varicocele repair in selected infertile men with a clinical varicocele and abnormal semen findings
- Vasectomy reversal
- Sperm retrieval procedures such as testicular or epididymal sperm extraction
- Peyronie’s disease procedures in select cases
- Correction of obstruction when anatomically feasible
Assisted reproductive strategies
When natural conception is unlikely or time-sensitive, andrology often works closely with fertility clinics. Options may include:
- Intrauterine insemination (IUI)
- In vitro fertilization (IVF)
- Intracytoplasmic sperm injection (ICSI)
- Use of ejaculated, frozen, or surgically retrieved sperm
Supportive care
Supportive management may include counseling on timing intercourse, optimizing collection for semen testing, addressing sexual pain or anxiety, weight management, sleep optimization, and review of medications or substances that may harm fertility.
Lifestyle factors that affect andrology-related health
Not every male fertility or sexual health issue is caused by lifestyle, but lifestyle can meaningfully influence reproductive and hormonal health. In andrology, common modifiable factors include:
- Smoking: associated with poorer sperm quality and broader vascular health effects
- Heavy alcohol use: may affect hormones and sexual function
- Cannabis and recreational drug use: may impair reproductive hormones or sperm parameters in some men
- Anabolic steroids or non-prescribed testosterone: can strongly suppress sperm production
- Obesity: linked with lower testosterone, inflammation, heat effects, and metabolic dysfunction
- Poor sleep: can affect testosterone and overall hormonal balance
- Heat exposure: frequent hot tubs, saunas, or occupational heat may affect sperm production in some contexts
- Poorly controlled chronic disease: especially diabetes, hypertension, and sleep apnea
Practical steps that may help
- Maintain a healthy weight if possible.
- Stop smoking and avoid anabolic steroids.
- Review testosterone use with a doctor if fertility matters.
- Limit excess alcohol and discuss recreational drugs frankly.
- Prioritize sleep and evaluate possible sleep apnea when relevant.
- Manage diabetes, blood pressure, and other chronic conditions.
- Avoid assuming supplements alone will fix a diagnosed problem.
Lifestyle improvement is often worthwhile, but persistent symptoms or abnormal test results still deserve medical evaluation.
Common misconceptions about andrology
“Andrology is just male fertility.”
Not quite. Fertility is a major part of it, but andrology also includes erections, ejaculation, testosterone, penile health, and testicular conditions.
“If I can have sex, my fertility must be fine.”
False. Sexual performance and fertility are related in some cases, but many fertile and infertile men have no obvious sexual symptoms either way.
“A normal testosterone level means there is no hormonal problem.”
Not always. Timing, SHBG, free testosterone, symptoms, and other hormones may all affect interpretation.
“Testosterone therapy improves fertility.”
This is a major misconception. Exogenous testosterone often suppresses sperm production and may worsen fertility.
“One semen analysis tells the whole story.”
No. Sperm parameters fluctuate, and fertility depends on multiple male and female factors. Repeat testing and clinical context matter.
When to see a doctor
Consider seeing a doctor, urologist, or andrology specialist if you have any of the following:
- You and your partner have not conceived after 12 months of trying
- You are 35 or older as a couple and have tried for 6 months without success
- You have an abnormal semen analysis
- You have low libido, erectile dysfunction, or ejaculatory problems that are persistent or distressing
- You suspect low testosterone symptoms
- You have testicular pain, swelling, a palpable lump, or scrotal heaviness
- You have a visible varicocele or a history of undescended testicle
- You have used testosterone or anabolic steroids and now want fertility
- You have no sperm in the semen, very low sperm counts, or repeated pregnancy loss in the couple
Urgent symptoms such as sudden severe testicular pain, a new testicular mass, or acute swelling need prompt medical attention.
Questions to ask your doctor
If you are seeing an andrology specialist or fertility-focused urologist, these questions can help you get more value from the visit:
- What is the most likely cause of my symptoms or abnormal results?
- Do I need repeat semen analysis or repeat hormone testing?
- Are my testosterone levels being interpreted correctly for my age, symptoms, and SHBG?
- Could any medications, supplements, or testosterone use be affecting my fertility?
- Do I need imaging, genetic testing, or referral to a fertility clinic?
- Would treating a varicocele or hormone issue likely improve fertility in my case?
- What are the risks and benefits of treatment options?
- If I want children, which treatments could reduce sperm production?
- Should my partner and I be evaluated at the same time?
FAQs
What is andrology in simple terms?
Andrology is the area of medicine that focuses on men’s reproductive health, sexual function, sperm, testosterone, and related conditions.
Is an andrologist the same as a urologist?
Not exactly. Urology is the broader specialty. Andrology is a more focused area dealing with male fertility, sexual medicine, and reproductive hormones. Many andrologists are urologists with advanced expertise in these problems.
When should a man see an andrologist?
A man should consider andrology evaluation for infertility, abnormal semen analysis, erectile dysfunction, low libido, suspected low testosterone, testicular pain, varicocele, ejaculatory problems, or fertility planning after testosterone use or vasectomy.
Can andrology help with low sperm count?
Yes. Andrology can evaluate causes of low sperm count and, in some cases, identify treatable contributors such as varicocele, hormone issues, medication effects, or lifestyle factors.
Does testosterone treatment improve fertility?
Usually not. Exogenous testosterone can suppress sperm production and may reduce fertility. Men trying to conceive should discuss alternatives with a qualified clinician before starting it.
What tests are done in an andrology workup?
Common tests include semen analysis, testosterone and other hormone blood tests, physical examination, scrotal ultrasound, and sometimes genetic testing or sperm retrieval planning depending on the case.
Can erectile dysfunction be an andrology issue?
Yes. Erectile dysfunction is a common reason to see an andrology or sexual medicine specialist. Causes may be vascular, hormonal, neurologic, medication-related, psychological, or mixed.
Is andrology only for men trying to have a baby?
No. Andrology also covers erections, libido, ejaculation, penile curvature, scrotal symptoms, and hormone-related concerns, even when fertility is not the main issue.
What does an abnormal semen analysis mean?
It means one or more semen parameters fall outside reference ranges, but it does not automatically mean infertility. Results need to be interpreted alongside repeat testing, medical history, and the couple’s overall fertility picture.
Can lifestyle changes improve andrology-related problems?
Sometimes. Stopping smoking, avoiding anabolic steroids, improving sleep, treating obesity, and controlling chronic disease can support sperm health, hormone balance, and sexual function. But medical evaluation is still important when symptoms or test abnormalities persist.
References
- American Urological Association (AUA) and American Society for Reproductive Medicine (ASRM) guidance on male infertility and testosterone deficiency.
- European Association of Urology (EAU) Guidelines on Sexual and Reproductive Health.
- World Health Organization. WHO Laboratory Manual for the Examination and Processing of Human Semen.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) resources on male reproductive and urologic health.
- Endocrine Society clinical practice guidance on testosterone therapy and male hypogonadism.
- ASRM patient and professional resources on male infertility evaluation and treatment.
