My Clinical Approach
A diagnosis of azoospermia is one of the most difficult moments in the life of a couple trying to conceive. In my clinical practice, the first step is never surgery — it is a complete, evidence-based understanding of “why.”
Micro-TESE ≠ a simple diagnostic testicular biopsy. It is a therapeutic sperm-retrieval procedure with a microsurgical, targeted search, within the context of a complete IVF/ICSI plan — not an isolated diagnostic act.
What Is Azoospermia
Azoospermia means the complete absence of spermatozoa in appropriately examined semen. The diagnosis is not made from one casual sample, a home test, or low sperm concentration alone.
According to WHO methodology (6th edition) and current EAU guidance, the diagnosis is confirmed after centrifugation of the sample and microscopic examination of the pellet, to detect even minimal sperm that could potentially be used for ICSI without surgery. Azoospermia is confirmed on at least two consecutive semen analyses.
Azoospermia ≠ Sterility
Azoospermia does not necessarily mean there is no sperm at all inside the testis.
In non-obstructive azoospermia, spermatogenesis may be completely absent, severely impaired, or focal — present only in small, scattered areas within the testis. This focal spermatogenesis is the biological rationale behind micro-TESE.
Obstructive or Non-Obstructive Azoospermia?
Obstructive Azoospermia (OA)
Sperm production may be normal, but its delivery to the ejaculate is blocked.
Possible causes: CBAVD (congenital bilateral absence of the vas deferens), vasectomy, epididymal obstruction, post-surgical obstruction, ejaculatory duct obstruction.
Non-Obstructive Azoospermia (NOA)
The primary problem is severely impaired sperm production within the testis itself.
Possible causes: genetic abnormalities, testicular failure, history of cryptorchidism, gonadotoxic exposure, chemotherapy/radiotherapy, Klinefelter syndrome, idiopathic causes.
Micro-TESE is primarily a sperm-retrieval technique for selected patients with NOA — it is not automatically the preferred sperm-retrieval technique for obstructive azoospermia.
micro-TESE vs TESE vs TESA vs MESA/PESA
| Technique | What it is | Main role |
|---|---|---|
| micro-TESE | Microsurgical search of seminiferous tubules using a surgical microscope | NOA |
| Conventional TESE | Open tissue retrieval without microsurgical search | NOA (alternative/historical role) |
| TESA | Needle aspiration of testicular tissue | Lower performance in NOA — no longer recommended as first choice |
| MESA / PESA | Microsurgical or percutaneous sperm retrieval from the epididymis | Mainly obstructive azoospermia (OA) |
These abbreviations are not interchangeable. The choice of technique always depends on whether the diagnosis is OA or NOA.
Current Guideline Position (EAU)
- Comprehensive NOA evaluation (history, hormones, genetics, ultrasound) before any surgical decision.
- Surgical sperm retrieval is required in NOA candidates before ART/ICSI.
- Microdissection TESE is considered the treatment of choice for sperm retrieval in NOA.
- FNA and TESA are no longer recommended as definitive sperm-retrieval approaches in NOA.
- Routine FNA mapping before definitive TESE in NOA is not recommended.
- Surgical sperm retrieval should not be performed in complete AZFa/AZFb deletions.
- Preoperative biochemical/clinical variables are not considered sufficient or reliable predictors of outcome.
- Routine hormonal stimulation before micro-TESE is not recommended.
The recommendation of micro-TESE as the treatment of choice is based on low-to-moderate quality evidence (mainly observational studies) — it is not absolute scientific certainty, but the current clinical consensus of specialists.
What Should Be Assessed Before micro-TESE?
Medical & reproductive history
Previous fertility treatments, surgeries, chemotherapy/radiotherapy, cryptorchidism, medication/anabolic steroids.
Clinical examination
Testicular size and consistency, presence of the vas deferens, varicocele.
Repeat semen analyses
Confirming azoospermia on at least two tests.
Hormonal evaluation
FSH, LH, total testosterone, additional testing as indicated.
Scrotal ultrasound
Testicular volume, anatomy, signs of dysgenesis, any focal lesions.
Genetic testing
Karyotype and Y-chromosome microdeletion analysis.
A generic “fertility blood panel” is not used identically for every patient — the work-up is individualised.
Genetic Testing
Genetic testing is a central, not peripheral, part of the evaluation in severe spermatogenic failure. According to current EAU guidance, karyotype analysis and genetic counselling are offered to all men with azoospermia or severe oligozoospermia (<5 million sperm/mL). Y-chromosome microdeletion testing is performed at concentrations ≤1 million/mL, and considered at <5 million/mL.
Genetic counselling is mandatory for any couple with a documented genetic abnormality before proceeding with ART.
AZFa / AZFb / AZFc
Complete AZFa deletion
Very poor/essentially zero likelihood of sperm retrieval (associated with Sertoli-cell-only pattern).
Complete AZFb deletion
Very poor/essentially zero likelihood of sperm retrieval (associated with maturation arrest).
Complete AZFa+AZFb (or related deletions)
TESE/micro-TESE should not be performed when current guidelines consider the chance of retrieval essentially zero.
AZFc deletion
Variable phenotype (ranging from azoospermia to oligozoospermia). Sperm retrieval remains possible in a substantial proportion of cases.
Important for genetic counselling:
If sperm from a man with a Y-chromosome microdeletion is used for ICSI, the associated Y-chromosome infertility may be passed on to male offspring. Interpretation of partial deletions can be complex — specialised genetic counselling is required.
Klinefelter Syndrome
Men with Klinefelter syndrome (47,XXY) may retain focal spermatogenesis, and sperm can be retrieved in a substantial proportion of selected patients via TESE/micro-TESE.
- No guarantee of sperm retrieval.
- Some data suggest younger age may be associated with better outcomes, without a defined age threshold.
- Endocrine and metabolic health matters — increased risk of metabolic/cardiovascular disease.
- Fertility planning should ideally precede the start of exogenous testosterone therapy.
No fixed success percentage is given without context — published literature reports a wide range of outcomes depending on the patient population.
High FSH ≠ Certain Failure
High FSH ≠ certainty that there is no sperm inside the testis.
FSH is inversely correlated with spermatogonial count, but it does not accurately predict the presence of spermatogenesis during surgical sperm retrieval. Men with NOA and high FSH may still have focal areas of spermatogenesis at micro-TESE. Likewise, normal FSH does not guarantee successful retrieval. There is no “FSH cutoff” that universally denies the procedure.
Testicular Size
Small testicular volume often correlates with impaired spermatogenesis, but testicular size alone cannot reliably predict whether micro-TESE will succeed. An arbitrary mL cutoff is not used to deny a patient treatment.
Inhibin B / AMH
Inhibin B and AMH (anti-Müllerian hormone) have been studied as possible adjunct/investigational markers. Some emerging data associate lower preoperative AMH with a higher chance of positive sperm retrieval, but this requires further confirmation. Neither is a reliable, stand-alone predictor of outcome.
The Role of Ultrasound
Scrotal ultrasound helps assess testicular anatomy and volume, detect signs of testicular dysgenesis, focal lesions, and other scrotal pathology. Infertile men have an increased risk of testicular cancer compared with the general population — which is why ultrasound also has an oncological role.
Doppler perfusion patterns do not currently provide a sufficiently reliable routine method for predicting micro-TESE success, according to current data.
Is a Diagnostic Biopsy Needed First?
Generally no — a separate diagnostic testicular biopsy before therapeutic sperm retrieval is usually not recommended.
The reasoning is twofold: if sperm retrieval is needed, a prior diagnostic biopsy would expose the patient to an additional invasive procedure; and focal spermatogenesis means a single biopsy does not necessarily represent the entire testis.
Histological Findings
Hypospermatogenesis
Sperm production exists but is markedly reduced. Associated with a more favourable retrieval probability compared with other histological patterns, without a guaranteed success rate.
Maturation Arrest
Spermatogenesis stops at a particular developmental stage. Outcome varies by biological subtype and distribution — not always predictable from a single biopsy.
Sertoli-Cell-Only Syndrome (SCOS)
Absence of germ cells in the seminiferous tubules. Even a previous histological report of SCOS does not necessarily mean every microscopic area in both testes is identical — focal sperm production may occasionally exist.
Mixed Patterns
Coexistence of different histological patterns within the same testis — reinforces the rationale for extensive microsurgical search.
Histology never equates to a perfect map of the entire testis — an overly deterministic prognosis should not be given based solely on a previous biopsy.
How micro-TESE Works
The microscope allows selective visual assessment of seminiferous tubules and aims to increase targeted search, reduce unnecessary random tissue removal, and preserve as much testicular tissue and vascular anatomy as possible. The microscope does not “see” sperm — it visualises seminiferous tubules, not individual sperm in situ.
Surgeon vs Embryologist: Who Does What
One of the most important distinctions: the surgeon does not identify sperm themselves — they identify and select the most promising seminiferous tubules.
Surgeon → identifies/selects tissue
↓Embryologist → searches tissue for sperm
↓If sperm found → cryopreservation / ICSI
The success of micro-TESE is not only a surgical matter — it requires close cooperation between the reproductive urologist/andrologist, embryologist, IVF laboratory, and the assisted reproduction team. It is not an isolated surgical act independent of IVF/ICSI.
micro-TESE and ICSI
Testicular sperm retrieved in NOA are almost always used through ICSI (intracytoplasmic sperm injection).
Micro-TESE does not automatically restore sperm to the ejaculate, does not allow natural conception simply because sperm were found, and does not itself create a pregnancy. Sperm retrieval ≠ fertilisation ≠ pregnancy ≠ live birth.
Chances of Finding Sperm
We do not advertise a single, universal success rate. Published sperm-retrieval rates vary considerably depending on:
- the aetiology of NOA
- genetics
- prior surgery
- histology
- patient selection
- the laboratory
- the definition of “successful” retrieval
- study methodology
Current literature shows substantial heterogeneity: some meta-analyses report sperm-retrieval rates of approximately 45–55% with micro-TESE, while others find no clear difference versus conventional TESE — however, every direct head-to-head comparison has favoured micro-TESE. Live-birth rates of up to approximately 28% per ICSI cycle have been reported in some series — these are published literature figures, not personal clinic results or a guarantee for any individual patient.
There is currently no clinical marker that can reliably predict with certainty whether sperm will be found.
FSH, testosterone, testicular size, age, ultrasound, and inhibin B may influence the clinical estimate of probability, but none constitutes a reliable yes/no diagnostic test.
FNA Mapping
Fine-needle aspiration (FNA) mapping has been proposed as a method of mapping spermatogenesis before definitive sperm retrieval.
Current EAU guidance does not recommend routine FNA mapping before definitive TESE in NOA — it requires an additional invasive procedure, with uncertain added value, and no documented benefit for future salvage micro-TESE has been shown.
Are hCG / FSH / Clomiphene Citrate / Aromatase Inhibitors Needed Before micro-TESE?
Not routinely.
Current evidence does not support universal preoperative hormonal stimulation in men with idiopathic or hypergonadotropic NOA. If a genuinely treatable endocrine condition exists, this is a separate clinical scenario (see below).
Hypogonadotropic Hypogonadism ≠ Primary NOA
In true hypogonadotropic hypogonadism, spermatogenesis can sometimes be induced medically (hCG ± FSH). These patients should not be automatically referred directly to micro-TESE — this represents a potentially treatable secondary hormonal deficiency, distinct from primary spermatogenic failure.
Important testosterone warning:
Exogenous testosterone suppresses gonadotropins and spermatogenesis and is not a treatment for male infertility. Testosterone therapy is not recommended for men actively pursuing fatherhood without specialist fertility planning. If hypogonadism is present, fertility and endocrine goals must be coordinated.
Azoospermia following anabolic-androgenic steroid use may be potentially reversible. These patients are not automatically characterised as micro-TESE candidates before appropriate endocrine assessment and a recovery strategy.
Varicocele Before micro-TESE
In men with NOA and a clinical varicocele, varicocele repair before sperm retrieval remains a nuanced decision. Evidence suggests possible benefit in selected men, but the quality of evidence is limited. The decision takes into account the female partner’s age and ovarian reserve, ART timing, the genetic aetiology, prior surgery, and the possibility of delaying ART.
Repairing every varicocele before every micro-TESE is not recommended. The decision is individualised. See our page on Microsurgical Varicocelectomy.
Does micro-TESE Make Sense After Failed TESE/TESA?
Potentially yes, in selected cases. Salvage micro-TESE can retrieve sperm in a substantial proportion of men after failed TESA or conventional TESE.
- Success is not guaranteed.
- Prior surgery may alter the anatomy.
- Original histology and genetics matter.
- Timing/strategy should be individualised.
Repeat/salvage micro-TESE after a previously failed micro-TESE may be considered in highly selected patients. Before repeating, the exact previous intraoperative findings, embryology report, histology, genetics, endocrine status, interval since surgery, and fertility plan are reassessed. It is not a rationale for indefinite repeat surgery.
The extent of surgery (unilateral or bilateral search) is not predetermined — it depends on intraoperative findings, embryology findings, history, anatomy, and patient safety.
Fresh or Frozen Sperm — Timing With IVF
Retrieved sperm may be used fresh, cryopreserved, or both, depending on availability and the IVF strategy. In NOA, sperm numbers can be very limited — which is why coordination with the IVF laboratory is essential.
Synchronous retrieval
micro-TESE performed around the partner’s oocyte retrieval. Maximises the availability of fresh sperm, but what happens to the oocytes if no sperm are found must be discussed beforehand.
Retrieval and cryopreservation in advance
When feasible. Allows the IVF cycle to be scheduled independently of micro-TESE success.
If Sperm Are Found
micro-TESE
↓viable sperm found
↓embryology processing
↓fresh use and/or cryopreservation
↓ICSI
↓possible fertilisation → embryo development → implantation → pregnancy → live birth
If No Sperm Are Found
A negative micro-TESE means no usable sperm were identified during that specific retrieval procedure. It does not mean the patient did anything wrong.
- Review of the pathology report.
- Review of genetics.
- Endocrine follow-up.
- Assessing whether a repeat retrieval has a rational basis.
- Donor sperm.
- Adoption or other family-building options, according to the couple’s preferences.
Incidental Findings, Testicular Cancer, and Onco-TESE
Evaluation of NOA can occasionally reveal abnormalities on ultrasound. Suspicious intratesticular lesions should follow the appropriate testicular-tumour diagnostic pathway — see our page on Testicular Cancer. Micro-TESE is not performed through a suspicious lesion without appropriate oncological planning.
In selected patients with testicular tumour and severe infertility/azoospermia, onco-TESE may occasionally be considered as part of fertility preservation at the time of radical orchiectomy — this is a highly specialised option, not routine practice.
When sperm is present in the ejaculate, sperm cryopreservation before gonadotoxic therapy is generally preferred over invasive retrieval. Surgical retrieval has a role only in selected scenarios (e.g. azoospermia at the time of testicular cancer diagnosis).
Risks and Possible Complications
Pain / swelling / bruising
Expected, transient reaction.
Hematoma
Recognised possible complication.
Infection
Rare, needs evaluation if it occurs.
Testicular fibrosis
Possible, with uncertain long-term functional significance.
Vascular injury
Rare, recognised risk.
Testicular atrophy
Rare but recognised complication.
Temporary or persistent testosterone decline
See detailed section below.
Failure to find sperm
Not technically a “complication”, but a possible outcome.
Testosterone After the Procedure
Men with NOA may already have some degree of impaired Leydig-cell function before surgery. After TESE/micro-TESE, testosterone may show a temporary decline, with gradual recovery over months — some patients may develop clinically significant hypogonadism.
Long-term endocrine follow-up is reasonable after surgical testicular sperm-retrieval procedures.
Recovery
Hospital stay
A day-case procedure in the vast majority of cases.
Local discomfort / swelling
Expected, resolves gradually — no fixed timeline for everyone.
Wound care
According to the surgeon’s instructions.
Supportive underwear
May be recommended, if indicated.
Return to work
Depends on occupation, extent of surgery, pain, and swelling.
Exercise
Gradual resumption according to the surgeon.
Follow-up
Endocrine reassessment as indicated.
When to Contact Us Urgently
Contact us immediately if you notice:
- Rapidly increasing scrotal swelling
- Severe or worsening pain
- Significant or persistent bleeding
- Fever or chills
- Redness or purulent discharge from the incision
- Significant testicular enlargement
- General deterioration
Sperm Retrieval ≠ IVF Success
Successfully finding sperm is only the first step.
These are different, independent endpoints: sperm-retrieval rate → usable sperm → fertilisation rate → embryo development → clinical pregnancy → live birth.
Fertility treatment is couple-based. The final outcome also depends on the partner’s age, ovarian reserve, oocyte quality, uterine factors, embryo quality, and the IVF laboratory. Pregnancy probability is not quoted based solely on micro-TESE.
The Patient Journey
No sperm in semen
Starting point of evaluation.
Repeat/confirm semen analysis per WHO/EAU
Two consecutive tests with centrifugation.
Azoospermia confirmed
—
Obstructive or non-obstructive?
Clinical examination, hormones, anatomy.
OA → investigate obstruction
Reconstruction / MESA / PESA / TESE / TESA depending on cause.
NOA → hormonal + genetic + ultrasound + clinical evaluation
—
Treatable cause?
Hypogonadotropic hypogonadism → medical induction of spermatogenesis where appropriate. Complete AZFa/AZFb → NO TESE/micro-TESE.
Candidate for ART
→ micro-TESE
Sperm found or not
Embryologist → fresh/frozen → ICSI, or reassessment/individualised counselling.
Frequently Asked Questions (FAQ)
What is micro-TESE?
It is a microsurgical procedure to search for and retrieve sperm from the testis, mainly in men with non-obstructive azoospermia (NOA), so that any sperm found can be used for ICSI.
Is micro-TESE just a testicular biopsy?
No. Micro-TESE is not a simple diagnostic biopsy — it is a therapeutic sperm-retrieval procedure, involving a microsurgical, targeted search across the whole testis, not sampling from a single spot.
What is azoospermia?
It is the complete absence of spermatozoa in appropriately examined semen, confirmed after centrifugation and microscopic examination of the pellet. It is not diagnosed from one casual sample or a home test.
What is the difference between obstructive and non-obstructive azoospermia?
In obstructive azoospermia (OA), sperm production may be normal but sperm cannot reach the ejaculate. In non-obstructive azoospermia (NOA), the primary problem is impaired sperm production itself. This distinction changes the entire treatment strategy.
When is micro-TESE needed?
Mainly in selected men with confirmed NOA who are proceeding with assisted reproductive technology (ART/ICSI), after a complete andrological, hormonal, and genetic evaluation.
Are two semen analyses needed to confirm azoospermia?
Yes. Azoospermia is confirmed on at least two consecutive semen analyses with centrifugation, following WHO methodology.
Is genetic testing needed?
Yes, almost always. Karyotype analysis and Y-chromosome microdeletion testing are offered to men with azoospermia or severe oligozoospermia (<5 million/mL), together with genetic counselling.
What are the AZFa, AZFb, and AZFc microdeletions?
These are regions of the Y chromosome linked to spermatogenesis. Complete deletion of AZFa or AZFb is associated with a very poor prognosis for sperm retrieval. AZFc deletion has a variable phenotype, and sperm can be found in a substantial proportion of cases.
Can micro-TESE be performed in complete AZFa/AZFb deletion?
No. According to current guidelines, surgical sperm retrieval should not be performed in complete AZFa or AZFb deletions, as the chance of finding sperm is considered essentially zero.
Can it be performed in AZFc deletion?
Yes, sperm retrieval remains possible in a substantial proportion of men with AZFc deletion. Genetic counselling is required, since if the sperm is used for ICSI, the deletion may be passed on to male offspring.
Can micro-TESE be performed in Klinefelter syndrome?
Yes, in selected patients. Men with Klinefelter syndrome may retain focal spermatogenesis, and sperm can be retrieved in a substantial proportion of selected cases, with no guarantee. Long-term endocrine follow-up is also needed.
Does high FSH mean sperm will not be found?
Not necessarily. FSH is inversely correlated with spermatogonial count, but it does not reliably predict the presence of spermatogenesis at micro-TESE. Men with NOA and high FSH may still have focal areas of sperm production.
Does small testicular size rule out the procedure?
No. Small testicular volume is often associated with impaired spermatogenesis, but it cannot reliably predict on its own whether sperm will be found.
Is a biopsy needed before micro-TESE?
Generally no. A separate diagnostic testicular biopsy before therapeutic sperm retrieval is usually not recommended, as it would mean a second invasive procedure, while focal spermatogenesis means a single biopsy does not represent the entire testis.
What is the difference between micro-TESE and conventional TESE?
Micro-TESE uses a surgical microscope for a targeted search of seminiferous tubules that appear more likely to contain spermatogenesis, with less tissue removal. Conventional TESE is an open biopsy without microsurgical search.
What is the difference between micro-TESE and TESA?
TESA is needle aspiration of testicular tissue, less invasive but with lower sperm-retrieval performance in NOA compared with TESE/micro-TESE. It is no longer recommended as a first-choice option in NOA.
What is MESA/PESA?
These are techniques for retrieving sperm from the epididymis (microsurgical or percutaneous), mainly useful in obstructive azoospermia, not NOA.
What does the surgeon see through the microscope?
The surgeon sees the seminiferous tubules and selects those that appear larger, more dilated, and more opaque — features associated with a higher likelihood of active spermatogenesis. The microscope does not “see” individual sperm.
Who ultimately confirms whether sperm are present?
The embryologist. The surgeon identifies and selects the most promising seminiferous tubules; the embryologist examines the tissue in the laboratory to confirm whether viable sperm are present.
What are the chances of finding sperm?
This varies considerably depending on the cause of NOA, genetics, histology, and prior surgery. Published literature reports a wide range of retrieval rates — there is no single success rate that applies to every patient.
Is there a way to reliably predict success before surgery?
No. There is currently no reliable preoperative marker (hormonal, imaging, or clinical) that can guarantee with certainty whether sperm will be found.
Are hCG, FSH, clomiphene citrate, or aromatase inhibitors needed before micro-TESE?
Not routinely. Current evidence does not support universal preoperative hormonal stimulation in idiopathic/hypergonadotropic NOA. Individual use is decided case-by-case by the specialist.
What if a previous TESE or TESA has failed?
Salvage micro-TESE can retrieve sperm in a substantial proportion of selected men, although success is not guaranteed.
What if a previous micro-TESE has failed?
A repeat micro-TESE may be considered in very selected patients, after reassessing previous findings, histology, genetics, and endocrine status — not as an automatic repeat.
Is sperm used fresh or frozen?
Both are possible, depending on availability and the IVF strategy. Because sperm numbers can be very limited in NOA, coordination with the IVF laboratory is essential.
Is IVF/ICSI always needed?
Yes. Sperm retrieved in NOA is used through ICSI — micro-TESE does not automatically restore sperm to the ejaculate nor allow natural conception.
If sperm are found, does that mean pregnancy will occur?
No. Sperm retrieval is only the first step. Fertilisation, embryo development, implantation, pregnancy, and ultimately live birth follow — these are separate, independent endpoints.
Can testosterone be affected after micro-TESE?
Yes, this is possible. A temporary drop in testosterone may occur, usually with gradual recovery over months. Long-term endocrine follow-up is recommended.
What are the complications of micro-TESE?
Pain, swelling, bruising, hematoma, infection, testicular fibrosis, rarely vascular injury or testicular atrophy, and the possibility of failing to find sperm.
When should I contact the doctor urgently after the procedure?
In case of rapidly increasing swelling, severe or worsening pain, significant bleeding, fever, redness/purulent discharge from the incision, or general deterioration.
Related Topics
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The decision for micro-TESE should not rest on a single FSH value or testicular size alone. It follows a complete andrological, hormonal, and genetic evaluation to confirm non-obstructive azoospermia, exclude treatable causes, and assess whether surgical sperm retrieval is the appropriate choice within the couple’s overall IVF/ICSI plan.
References
- EAU Guidelines on Sexual and Reproductive Health 2026 — Chapter 11, Male Infertility (Sections 11.3 Diagnostic work-up, 11.4.3 Varicocele, 11.6.1 Obstructive azoospermia, 11.6.2 Non-obstructive azoospermia).
- WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th edition.
- Published systematic reviews/meta-analyses comparing micro-TESE with conventional TESE and TESA in NOA, as cited in the guidelines above.
- Evidence note: the recommendation of micro-TESE as the treatment of choice in NOA is based on low-quality evidence (mainly observational studies); there is an insufficient number of head-to-head randomised trials comparing techniques.
Medical Review
Dr. Marinos Vasilas, Urologist – Andrologist
Dr. Marinos Vasilas provides individualised andrological assessment for men with azoospermia, in collaboration with specialised embryology/IVF laboratories, with emphasis on accurate OA/NOA differential diagnosis before any surgical decision.
View Full ProfileThis article is for informational purposes only and does not replace medical advice, diagnosis, or treatment. Micro-TESE does not guarantee sperm retrieval; finding sperm does not guarantee fertilisation, pregnancy, or live birth; genetic testing can materially change a patient’s candidacy for the procedure; not every case of azoospermia requires micro-TESE; obstructive and non-obstructive azoospermia require different strategies; endocrine causes may require treatment before surgery; and post-operative testosterone monitoring may be appropriate. Always consult your urologist-andrologist for individualised management of your case.
