My clinical approach
Varicocele is one of the most frequently over-treated conditions in andrology. It affects roughly one in six to seven men in the general population, and the vast majority will never need surgery.
The principle I follow: patient selection is just as important as surgical technique. Before recommending repair, I always consider the full picture — clinical examination, semen analysis, age and the couple’s reproductive picture, or documented impact on testicular development in adolescents.
A varicocele is not an automatic indication for surgery. Neither the grade on physical examination, nor a single Doppler finding, is sufficient on its own to justify repair.
What is microsurgical varicocelectomy
Microsurgical varicocelectomy is a procedure performed through a small incision in the groin or subinguinal area, using an operating microscope, in which the abnormally dilated veins of the spermatic cord are identified and interrupted, while attempting to preserve the testicular artery, the lymphatic vessels and the vas deferens.
Microsurgery ≠ laser ≠ robotic ≠ laparoscopy. The term refers exclusively to the use of optical magnification (an operating microscope) for precise identification of the structures of the spermatic cord — not to a different energy technology or robotic system.
Clinical vs. Subclinical Varicocele
The classification used in clinical practice is:
Subclinical
Not palpable or visible at rest or with Valsalva; detected only by Doppler ultrasound.
Grade 1
Palpable only during the Valsalva manoeuvre.
Grade 2
Palpable at rest, without Valsalva.
Grade 3
Visible and palpable at rest.
Clinical ≠ Subclinical Varicocele. Current guidelines do not recommend repair of a subclinical varicocele for the sole purpose of improving fertility — randomised studies have shown no benefit for spontaneous conception in this group. The grade on physical examination alone also does not determine the need for surgery.
The role of Doppler ultrasound
The primary diagnosis of varicocele is made by physical examination. Colour Doppler scrotal ultrasound is used as an adjunct when the physical examination is inconclusive, or to detect recurrence/persistence after surgery — it does not replace clinical examination.
According to current guidance, a maximum venous diameter of > 3mm in the upright position and during the Valsalva manoeuvre, combined with reflux lasting > 2 seconds, correlate with a clinically significant varicocele. These findings are always assessed together with the clinical picture, not in isolation.
Right-sided / sudden-onset varicocele — when caution is needed
Varicocele is typically left-sided, due to venous anatomy (the left internal spermatic vein drains at a right angle into the renal vein). This on its own is not an abnormal finding — it is the usual pattern.
Situations warranting further evaluation:
- Isolated right-sided varicocele
- Sudden onset in an adult
- A varicocele that does not reduce when lying down
- Unusual age or clinical context of presentation
In these situations, further evaluation for secondary causes (e.g. retroperitoneal or abdominal pathology) is considered — this does not mean every right-sided varicocele indicates malignancy.
Varicocele and Male Infertility
Varicocele is present in about 15% of the general population, 25% of men with abnormal semen analysis, and 35–40% of men presenting with infertility. Worse semen parameters correlate with a higher grade of varicocele and with age.
A typical candidate for repair is a man with:
Otherwise unexplained couple infertility
No other clear cause of infertility has been identified.
A clinical (palpable) varicocele
Not subclinical — confirmed on physical examination.
Abnormal semen parameters
On at least two consecutive semen analyses.
A partner with good ovarian reserve
The couple’s timeline allows for observing an outcome.
The Couple, Not Just the Man
In infertility care, we always treat the man within the context of the couple. Factors influencing the decision include the female partner’s age and ovarian reserve, the duration of infertility, any female-factor infertility, previous assisted reproduction attempts, and the overall reproductive timeline available to the couple.
A technically appropriate microsurgical repair is not always the first step — if the couple needs urgent assisted reproduction for another reason (e.g. advanced age or reduced ovarian reserve of the partner), the strategy is discussed jointly with a reproductive medicine specialist.
Semen Analysis: what it shows, what it doesn’t
Semen analysis assesses concentration, total sperm number, motility, morphology and ejaculate volume, according to WHO criteria. No single parameter is diagnostic of infertility on its own, and semen parameters show natural biological variability — which is why, when the baseline analysis is abnormal, at least a second confirmatory test is recommended before any treatment decision is made.
Semen analysis evaluates sperm parameters — it is not, on its own, a “fertile / infertile” test. A couple’s fertility is multifactorial.
Does Surgery Improve Semen Parameters?
In men with a clinical varicocele and abnormal semen parameters, meta-analyses of randomised and observational studies show statistically significant improvement in sperm concentration, motility and morphology compared with untreated controls.
However:
- Not every patient improves.
- The degree of improvement varies considerably between patients.
- One parameter (e.g. concentration) may improve more than another.
- Improved semen parameters do not guarantee spontaneous conception.
We do not quote “guaranteed” improvement percentages — counselling is based on individualised assessment, not generalised figures.
Pregnancy After Repair
In selected couples with otherwise unexplained infertility and a clinical varicocele, Cochrane systematic reviews have shown that repair may increase the chance of spontaneous pregnancy compared with delayed treatment or observation alone. The average time to improvement in semen parameters corresponds to one to two spermatogenic cycles, and spontaneous conception, when it occurs, has most often been reported six to twelve months after varicocelectomy.
Pregnancy is a couple-level outcome, not an individual surgical result. It depends on male fertility, female fertility, age, duration of the attempt, intercourse timing and other reproductive factors. We do not offer “guaranteed pregnancy” or quote specific success rates as a promise.
Do I Need Varicocele Repair Before IVF/ICSI?
Sometimes, but not automatically. In selected men with a clinical varicocele undergoing ICSI, studies have shown improved clinical pregnancy and live-birth rates when varicocele repair preceded treatment, compared with ICSI without prior repair. Similar findings have been reported in groups of men with oligozoospermia or azoospermia/oligo-azoospermia who proceeded to assisted reproduction.
The decision depends on the clinical picture of the varicocele, the severity of the semen abnormalities, the partner’s age/ovarian reserve, the ART timeline, and any prior ART outcomes. Surgery does not always avoid the need for IVF/ICSI — in many couples the two approaches are combined.
Sperm DNA Fragmentation (SDF)
Varicocele has been associated with oxidative stress and raised sperm DNA fragmentation (SDF) in selected men. Repair has been associated with reduced SDF indices, with the greatest benefit described in men with higher preoperative values.
SDF testing is not mandatory in every infertile man. It is mainly indicated in couples with recurrent pregnancy loss, failed implantation/embryogenesis after ART, or unexplained infertility — always after excluding other causes of raised SDF.
Non-Obstructive Azoospermia (NOA)
In selected men with non-obstructive azoospermia (NOA) and a clinical varicocele, non-randomised studies and meta-analyses have shown sperm appearing in the ejaculate after repair in a proportion of patients, as well as improved rates of successful surgical sperm retrieval (e.g. at subsequent microTESE) in those who do not spontaneously regain sperm in the ejaculate.
The quality of evidence in this population is lower than for straightforward oligozoospermia. The outcome is not predictable, and repair in NOA should not be presented as an established “cure” for azoospermia — a thorough discussion of the risks and benefits with the patient is required before any decision.
Varicocele and Pain
Varicocele-associated discomfort is typically described as dull, dragging, worse with prolonged standing or exertion, and improved when lying down. However, scrotal pain has many possible causes — epididymal pathology, hernia, testicular tumour, torsion/intermittent torsion, infection, neuropathic or referred pain — and these must be excluded before pain is attributed to the varicocele.
Initial management usually involves activity modification, scrotal support and an appropriate analgesic strategy following clinical assessment. Surgery is considered in selected patients with persistent, clinically compatible pain after inadequate response to conservative management — without a guarantee of complete relief.
Varicocele and Testosterone
Some studies suggest that varicocele repair may improve serum testosterone, particularly in men with lower baseline values. These findings come mainly from meta-analyses of observational data and require further confirmation with randomised studies.
Microsurgical repair is not a “testosterone-boosting” procedure. It is not recommended for asymptomatic men with normal testosterone levels with the sole goal of a hypothetical increase.
Varicocele in Adolescents
Decision-making differs significantly from adults. Most adolescents with a varicocele will never experience a fertility problem in adult life — there is therefore a significant risk of over-treatment.
According to current guidelines, prophylactic repair in an adolescent is mainly recommended when persistent impairment of growth of the affected testicle is documented (a volume difference of > 2mL or > 20% compared to the other side), confirmed on two consecutive visits about six months apart, and/or documented abnormal semen analysis in older adolescents.
Not every adolescent with a Grade 3 varicocele undergoes surgery — serial clinical/ultrasound follow-up is required.
Why Microsurgery?
The optical magnification of the operating microscope helps clearly distinguish the veins from the testicular artery, the lymphatic vessels and the vas deferens — structures that lie only a few millimetres apart. The goal is selective interruption of the pathological veins while preserving the other critical structures.
Magnification does not eliminate risk entirely — no technique has a zero rate of recurrence, hydrocele or arterial injury.
How the Procedure is Performed
In the microsurgical subinguinal or inguinal approach, access is obtained below the external inguinal ring or through the inguinal canal respectively, without entering the abdomen. In general terms:
Anaesthesia (local with sedation, regional or general) is chosen individually by the surgeon and anaesthesiologist, depending on the technique, the centre and the patient.
Microsurgery vs. Laparoscopy vs. Embolization
| Microsurgery | Laparoscopy | Embolization | |
|---|---|---|---|
| Access | Inguinal / subinguinal | Intra-abdominal | Endovascular (catheter) |
| Magnification | Operating microscope | Laparoscopic optics | Fluoroscopy |
| Abdominal entry | No | Yes | No |
| Recurrence/persistence* | ≈0.4% | 3–6% | 3–11% |
| Hydrocele* | ≈0.44% | 7–43% | 3–10% |
* Indicative ranges from the international literature (EAU Guidelines on Sexual and Reproductive Health). Actual rates vary by centre, surgeon experience and technical variant.
No technique is “wrong” for every patient. Embolization is less locally invasive but involves radiation/contrast exposure and a possibility of technical failure depending on anatomy. Laparoscopy is an acceptable option, especially for bilateral disease, but requires general anaesthesia and abdominal entry. The choice is individualised based on anatomy, surgeon experience, prior treatment and patient preference.
Recurrence and Hydrocele
Recurrence or persistence of the varicocele can be due to unidentified venous branches, collateral circulation, individual anatomy, or prior surgery. The microsurgical technique is associated with among the lowest documented recurrence rates in the international literature — but never zero.
Hydrocele is a recognised possible complication due to disruption of lymphatic drainage around the testicle. Preservation of the lymphatics under magnification is precisely why the microsurgical technique is associated with lower hydrocele rates compared with other techniques — without the risk being eliminated.
Possible Complications
Scrotal swelling / bruising
An expected, temporary reaction to the incision and tissue handling.
Hydrocele
Due to disruption of lymphatic drainage — see the section above.
Scrotal haematoma
May require monitoring or, rarely, drainage.
Wound infection
Extended prophylactic antibiotics are not routinely required.
Testicular artery injury
May lead to testicular atrophy if blood supply is significantly compromised.
Altered skin sensation
Temporary or, less commonly, persistent change in sensation around the incision/scrotum.
Recovery
Hospital stay
The procedure is usually performed as day surgery.
Wound care
Local care as instructed by the surgeon; scrotal support if recommended.
Return to activity
Gradual, with timing determined individually depending on occupation and healing progress.
Exercise / weight-lifting
Gradual resumption following the surgeon’s instructions — not a fixed number of days for everyone.
Sexual activity
Resumed once local discomfort has settled, following the surgeon’s guidance.
Fertility follow-up
A repeat semen analysis after a sufficient interval, if fertility was the goal.
When to Contact Us Urgently
Contact us immediately if you notice:
- Worsening, severe pain not responding to analgesia
- Rapidly enlarging scrotal swelling or haematoma
- Significant bleeding from the incision
- Fever
- Redness, warmth or purulent discharge at the incision
- Marked testicular swelling or firmness
- Sudden deterioration in your general condition
The Patient Journey
Clinical varicocele / infertility / scrotal discomfort / adolescent finding
Starting point: clinical examination, ± Doppler ultrasound if needed.
Why is treatment being considered?
Fertility (semen analysis, couple assessment) or pain (exclusion of other causes, conservative trial) or adolescent (testicular development, serial follow-up).
Is there a real, guideline-supported indication?
Assessment based on current evidence — not just varicocele grade or an isolated Doppler finding.
Observation or intervention
If there is no clear indication: observation / alternative pathway. If there is: microsurgical repair.
Microsurgical repair
Identification of pathological veins while preserving the artery and lymphatics.
Recovery & follow-up
Surgical follow-up (wound, swelling, recurrence) and, where relevant, fertility follow-up (semen analysis).
Natural conception or assisted reproduction
According to the couple’s overall picture.
Frequently Asked Questions (FAQ)
What is a varicocele?
A varicocele is an abnormal dilation of the veins of the pampiniform plexus around the testicle, caused by venous reflux. It affects roughly 15% of the general male population.
Does every varicocele need surgery?
No. Most men with a varicocele never need any intervention. The decision depends on whether there is a clinical (palpable) varicocele combined with abnormal semen parameters and otherwise unexplained couple infertility, persistent pain compatible with varicocele, or documented impairment of testicular growth in an adolescent.
What is microsurgical varicocelectomy?
It is the procedure in which, using an operating microscope, the abnormally dilated veins of the spermatic cord are identified and interrupted, aiming to preserve the testicular artery, the lymphatic vessels and the vas deferens.
What does subinguinal microsurgical approach mean?
It means accessing the spermatic cord below the external inguinal ring, without opening the inguinal canal. It avoids entry into the abdomen and provides direct access to the spermatic cord, although it may involve identifying more venous branches.
What is a clinical varicocele?
It is a varicocele that is palpable or visible on physical examination. It is classified as Grade 1 (palpable only with Valsalva), Grade 2 (palpable at rest) or Grade 3 (visible and palpable at rest).
What is a subclinical varicocele, and does it need treatment?
It is a varicocele that is not palpable or visible clinically, but is detected only by Doppler ultrasound. Current guidelines do not recommend repair of a subclinical varicocele for the sole purpose of improving fertility — the evidence does not support this.
Is a scrotal Doppler ultrasound always needed?
Not always. The primary diagnosis is made by physical examination. Doppler is indicated when the physical examination is inconclusive, or to assess recurrence/persistence after surgery. It does not replace clinical examination.
When is repair indicated for infertility?
In a man with a clinical varicocele, abnormal semen parameters and otherwise unexplained couple infertility, provided the female partner has good ovarian reserve. The decision concerns the couple, not just the man.
Does semen quality improve after surgery?
In men with abnormal semen parameters and a clinical varicocele, meta-analyses show statistically significant improvement in sperm concentration, motility and morphology compared with untreated controls. Improvement is not universal or predictable in every individual patient — it varies.
When does improvement in semen parameters appear?
A full spermatogenic cycle takes about 74 days. Assessment is typically performed after at least one to two complete spermatogenic cycles. Spontaneous conception, when it occurs, has most often been reported six to twelve months after varicocelectomy.
Does surgery increase the chance of pregnancy?
In selected couples with otherwise unexplained infertility and a clinical varicocele, systematic reviews (Cochrane) show that repair may increase the chance of spontaneous pregnancy compared with observation. There is no guarantee of pregnancy for any individual patient — the outcome depends on many factors relating to the couple.
Are semen improvement, pregnancy and live birth the same thing?
No, these are three distinct endpoints. Improved semen parameters do not automatically translate into conception, and achieving pregnancy does not automatically translate into a live birth. We use the appropriate endpoint in each counselling discussion.
Do I need varicocele repair before IVF/ICSI?
Sometimes, but not automatically. In selected men with a clinical varicocele undergoing ICSI, studies show improved clinical pregnancy and live-birth rates when varicocele repair has preceded treatment. The decision depends on the female partner’s age/ovarian reserve, the ART timeline and the severity of the male factor — repair does not always avoid the need for IVF/ICSI.
Does surgery improve sperm DNA fragmentation (SDF)?
In selected men with a clinical varicocele and raised SDF, repair has been associated with a reduction in fragmentation indices. SDF testing is not required in every infertile man — it is mainly indicated in unexplained infertility or after failed assisted reproduction.
Does surgery have a role in non-obstructive azoospermia (NOA)?
In selected men with NOA and a clinical varicocele, repair has been associated with sperm appearing in the ejaculate in a proportion of patients, and with improved sperm retrieval rates at subsequent surgical retrieval. The quality of evidence in this group is lower than for straightforward infertility — it is not an established “cure” for azoospermia.
When is surgery indicated for pain?
When the pain has characteristics compatible with varicocele (dull, dragging, worse with standing or exertion, improved lying down) and other causes of scrotal pain have been excluded, after inadequate response to conservative management.
Can pain persist after surgery?
Yes, in some patients pain can persist, recur, or rarely change in character. Relief is reported across a wide range in the literature, but it is not guaranteed in every case.
Does surgery increase testosterone?
In selected men with a clinical varicocele and low baseline testosterone, meta-analyses have shown a rise in serum testosterone after surgery. These findings need careful interpretation and are not a reason to operate on asymptomatic men who simply want a “testosterone boost”.
When is surgery performed in an adolescent with varicocele?
Current guidance recommends surgery in adolescents mainly when persistent impairment of growth of the affected testicle is documented (a volume difference of > 2mL or > 20% compared to the other side), confirmed on two consecutive visits about six months apart. Not every adolescent with a Grade 3 varicocele undergoes surgery.
What is the difference between microsurgical and laparoscopic repair?
Microsurgical repair is performed through a small inguinal/subinguinal incision without entering the abdomen, with an emphasis on preserving the artery/lymphatics under magnification. Laparoscopic repair is performed intra-abdominally. Evidence generally shows lower recurrence and hydrocele rates with the microsurgical technique. Neither approach is “wrong” — the choice also depends on surgeon experience.
What is the difference between microsurgery and embolization?
Embolization is a catheter-based interventional radiology technique without a surgical groin incision, but with radiation/contrast exposure and a possibility of technical failure depending on anatomy. Neither method is universally superior — the choice is individualised.
Can a varicocele recur after surgery?
Yes, no technique has a zero recurrence rate. The microsurgical technique has among the lowest documented recurrence/persistence rates in the literature, but recurrence remains possible.
What is postoperative hydrocele, and how common is it?
It is fluid accumulation around the testicle due to disruption of lymphatic drainage. It is a recognised possible complication of all varicocele repair techniques, with the microsurgical technique associated with the lowest documented rates, though the risk is never zero.
Is there a risk of injury to the testicular artery?
Yes, it is a rare but recognised complication. The use of the operating microscope is specifically intended to reduce this risk through clear visual distinction of the artery from the veins, without eliminating it entirely.
How long is the recovery?
The procedure is usually performed as day surgery. Gradual return to daily activities, exercise and sexual activity is determined individually by the surgeon based on healing progress — there is no single universal timeline for everyone.
Do I need a repeat semen analysis after surgery?
Yes, if fertility was the goal. Repeat testing is performed after sufficient time has passed for at least one spermatogenic cycle to complete, according to your treating physician’s follow-up plan.
When should I contact the doctor urgently after surgery?
In case of worsening severe pain, rapidly enlarging swelling, significant bleeding, fever, redness or purulent discharge at the incision, or marked testicular swelling.
Related Topics
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The decision to repair a varicocele is not based solely on the size of the veins or the Doppler findings. Particularly when the goal is fertility, we assess the clinical finding, the semen analysis, testicular function and the couple’s overall reproductive plan. When there is a genuine indication, the microsurgical technique allows precise identification of the veins while attempting to preserve the testicular artery and the lymphatics.
References
- EAU Guidelines on Sexual and Reproductive Health 2026 — Male Infertility, Section 11.4.3 (Varicocele) — uroweb.org
- EAU Guidelines on Sexual and Reproductive Health 2026 — Semen Analysis and Sperm DNA Fragmentation, Section 11.3 — uroweb.org
- EAU Guidelines on Sexual and Reproductive Health 2026 — Non-Obstructive Azoospermia, Section 11.6.2 — uroweb.org
- WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th edition, 2021.
- Cochrane Database of Systematic Reviews — Surgery or embolization for varicoceles in subfertile men.
Medical Review
Dr. Marinos Vasilas, Urologist – Andrologist
Dr. Marinos Vasilas provides individualised assessment and microsurgical management of varicocele, with an emphasis on correct patient selection and preservation of the testicular artery and lymphatics.
View full profileThis article is for informational purposes only and does not replace medical advice, diagnosis or treatment. Not every varicocele requires treatment; a subclinical varicocele differs from a clinical one; improvement in semen parameters, pregnancy and live birth are not guaranteed outcomes; scrotal pain may have another cause; a testosterone increase is not guaranteed; indications in adolescents require specialist assessment; and assisted reproduction may still be needed even after surgery. Always consult your urologist for individualised management of your case.
