Residency · Residency · Urology

Surgical Management of Male Infertility

Varicocele Repair

Indications (AUA/ASRM)

Varicocele repair is indicated in men who have a palpable varicocele graded clinically from I to III, accompanied by at least one abnormal semen parameter. The couple should have a known infertility diagnosis, and the female partner must either have normal fertility or a correctable female factor. Treatment is not recommended for subclinical varicoceles that are detected only by ultrasound.

Surgical Approaches

Microsurgical Subinguinal Varicocelectomy (Gold Standard)

The microsurgical subinguinal varicocelectomy is considered the gold standard for varicocele repair. This procedure involves making an incision below the external inguinal ring and using an operating microscope with 15-25x magnification to identify and ligate all internal spermatic veins. During the procedure, the testicular artery, typically one or two in number and identified with Doppler assistance, is carefully preserved along with lymphatic vessels to reduce the risk of postoperative hydrocele. The vas deferens and its vessels are also preserved. Additionally, external spermatic (cremasteric) veins and gubernacular veins are ligated. This approach offers the lowest recurrence rate, typically less than 1-2%, and the lowest complication rate, with hydrocele formation occurring in less than 1% of cases due to lymphatic preservation. The procedure is usually performed on an outpatient basis.

Inguinal Varicocelectomy

Inguinal varicocelectomy involves an inguinal incision through which the spermatic cord is delivered. This can be performed with or without the use of a microscope, often relying on loupe magnification if a microscope is not used. Without microscopic assistance, there is a higher risk of arterial injury, and the recurrence rate ranges from 5-15%.

Laparoscopic Varicocelectomy

Laparoscopic varicocelectomy entails ligation of the internal spermatic vein at or above the internal inguinal ring. This can be done using the Palomo technique, which involves mass ligation of both artery and vein, or by sparing the artery. This approach is particularly useful for bilateral varicoceles. However, it requires general anesthesia and carries risks such as visceral injury. Recurrence rates are higher than with microsurgical repair, ranging from 5-15%.

Percutaneous Embolization (Interventional Radiology)

Percutaneous embolization involves retrograde venography followed by coil or sclerosant embolization of the varicocele veins. This technique has the advantage of requiring no incision, being outpatient, and providing immediate treatment. However, it exposes the patient to radiation, has a technical failure rate of 5-10%, and a recurrence rate of 5-10%. It is particularly useful when surgical repair has failed.

Outcomes of Varicocelectomy

Following varicocelectomy, 60-70% of patients demonstrate improvement in semen parameters. The spontaneous pregnancy rate after repair is approximately 30-40%, based on meta-analyses. Improvements in semen quality typically occur within 3-6 months, corresponding to one full spermatogenic cycle of about 72 days. Follow-up semen analysis is recommended at 3-4 months post-procedure.

<image>Intraoperative microsurgical view during subinguinal varicocelectomy showing identification of the testicular artery (preserved), dilated internal spermatic veins (ligated), and lymphatic channels (preserved)</image>

Vasectomy Reversal

Vasovasostomy (VV)

Vasovasostomy is a microsurgical end-to-end anastomosis of the vas deferens. It is indicated when the vasal fluid at the testicular end contains sperm or is clear and copious. The technique involves either a modified one-layer or a formal two-layer anastomosis, with separate suturing of the mucosal and muscularis/adventitia layers. This is performed under an operating microscope at 25-40x magnification using fine 9-0 or 10-0 nylon sutures. Precise mucosal approximation is critical for success. Patency rates after vasovasostomy range from 85-95%, with pregnancy rates between 50-70%, depending on factors such as the obstructive interval and the female partner’s age.

Vasoepididymostomy (VE)

Vasoepididymostomy involves an anastomosis of the vas deferens directly to an epididymal tubule. This procedure is indicated when no sperm are found in the vasal fluid at the testicular end, or when the fluid is thick and toothpaste-like, suggesting an epididymal blowout or obstruction. The absence of sperm in the vasal fluid indicates a secondary epididymal obstruction. Two main microsurgical techniques are used: the end-to-side intussusception method, where two 10-0 sutures are placed through a single epididymal tubule and the vas deferens is intussuscepted over the tubule, and the triangulation technique, which uses three sutures through the epididymal tubule. Vasoepididymostomy is more technically demanding than vasovasostomy, with patency rates of 60-80% and pregnancy rates of 30-50%.

Factors Affecting Reversal Success

Several factors influence the success of vasectomy reversal. A shorter obstructive interval of less than three years is associated with better outcomes, while intervals longer than 15 years predict poorer success. The presence of sperm in vasal fluid correlates with better prognosis, whereas thick, paste-like fluid without sperm indicates worse outcomes. Female partner age under 35 years favors higher pregnancy rates, while age over 40 reduces success. Vasovasostomy generally yields better results than vasoepididymostomy, and surgeon experience is critical, with high-volume surgeons achieving superior outcomes.

Sperm Banking During Reversal

Concurrent sperm cryopreservation should be considered during vasectomy reversal, either by aspirating sperm from vasal fluid or performing a testicular biopsy. This provides a backup option for assisted reproductive techniques such as IVF or ICSI if the reversal fails. The AUA recommends discussing sperm banking with all patients undergoing reversal.

<image>Microsurgical technique diagrams comparing vasovasostomy (two-layer end-to-end anastomosis) and vasoepididymostomy (end-to-side intussusception technique)</image>

Microsurgical Testicular Sperm Extraction (Micro-TESE)

Indications

Micro-TESE is indicated primarily for men with non-obstructive azoospermia (NOA) who require sperm retrieval for IVF/ICSI. It is used when medical optimization has failed, in cases of Klinefelter syndrome with azoospermia, post-chemotherapy azoospermia, and in men with maturation arrest or Sertoli cell-only syndrome who may have focal areas of spermatogenesis.

Technique

The procedure is performed under general anesthesia using an operating microscope. An equatorial incision is made in the tunica albuginea, and the seminiferous tubules are systematically examined at 20-25x magnification. Dilated, opaque tubules are targeted for biopsy as they are more likely to contain active spermatogenesis, whereas thin, translucent tubules often represent Sertoli cell-only areas. Targeted tissue samples are removed and immediately examined by an andrologist or embryologist using wet preparation. The tunica albuginea is then closed.

Sperm Retrieval Rates

Sperm retrieval rates vary by diagnosis. In Klinefelter syndrome, rates are 40-60%, while men with Y chromosome microdeletions in the AZFc region have retrieval rates of 50-70%. Sertoli cell-only syndrome yields retrieval rates of 30-40%, and maturation arrest or post-chemotherapy cases have rates of 40-60%. Complete deletions of AZFa or AZFb are associated with near-zero retrieval rates, making micro-TESE contraindicated.

Advantages Over Conventional TESE

Micro-TESE offers higher sperm retrieval rates of 50-60% compared to 30-40% with conventional TESE. It involves less tissue removal and causes less vascular injury, thereby better preserving testicular function.

Hormonal Optimization Before Micro-TESE

Hormonal optimization prior to micro-TESE can improve outcomes. Clomiphene citrate at doses of 25-50 mg daily or every other day raises FSH, LH, and testosterone levels. Human chorionic gonadotropin (hCG) at 1,000-2,000 IU administered two to three times weekly stimulates intratesticular testosterone production. Anastrozole at 1 mg daily is used if estradiol is elevated or if the testosterone to estradiol ratio is less than 10. This regimen is typically continued for 3-6 months before the procedure. Exogenous testosterone must be discontinued at least six months prior to sperm retrieval, as it suppresses spermatogenesis and requires time for hormonal recovery.

Sperm Retrieval Techniques for Obstructive Azoospermia

MESA (Microsurgical Epididymal Sperm Aspiration)

MESA is the gold standard for sperm retrieval in obstructive azoospermia. Under an operating microscope, an epididymal tubule is opened and sperm-rich fluid is aspirated. This technique yields high-quality and abundant sperm suitable for cryopreservation. It is indicated in congenital bilateral absence of the vas deferens (CBAVD), post-vasectomy cases where reversal is not desired, and epididymal obstruction.

PESA (Percutaneous Epididymal Sperm Aspiration)

PESA involves needle aspiration of the epididymis without microsurgical assistance. It can be performed as an office procedure but typically yields fewer sperm. It is useful when microsurgical expertise is unavailable.

Testicular Sperm Aspiration (TESA)

TESA is a needle biopsy of testicular tissue. It is simple but has a lower sperm yield compared to MESA in obstructive azoospermia. However, it may be sufficient for IVF/ICSI.

Testicular Sperm Extraction (TESE)

TESE involves an open biopsy of testicular tissue and can be performed conventionally with random biopsies or as micro-TESE with targeted sampling. Conventional TESE is adequate for obstructive azoospermia, whereas micro-TESE is preferred for non-obstructive azoospermia.

Ejaculatory Duct Obstruction

Diagnosis

Ejaculatory duct obstruction is suspected in men with low semen volume (less than 1.4 mL), azoospermia or severe oligospermia, normal FSH levels, and palpable vasa deferentia. Transrectal ultrasound (TRUS) typically shows dilated seminal vesicles greater than 1.5 cm in the anteroposterior dimension, ejaculatory duct cysts, or calcifications. Confirmatory diagnosis can be made by seminal vesiculography or TRUS-guided aspiration of seminal vesicle fluid, with the presence of sperm in the aspirate confirming patency of the proximal reproductive tract.

Treatment

The standard treatment is transurethral resection of the ejaculatory ducts (TURED), which involves resecting tissue at the verumontanum to open the obstructed ducts. This is performed with a resectoscope, often under TRUS guidance. Success rates include semen parameter improvement in 50-70% of patients and pregnancy rates of 20-30%. Complications can include retrograde ejaculation in about 5% of cases, recurrent obstruction, epididymitis, and rarely rectal injury.

Electroejaculation and Penile Vibratory Stimulation

Penile Vibratory Stimulation (PVS)

PVS is the first-line treatment for anejaculation in men with spinal cord injury (SCI) above the T10 level. A high-frequency vibrator is applied to the glans penis to induce ejaculation. Success rates range from 70-90% in SCI patients with an intact reflex arc. However, there is a risk of autonomic dysreflexia in patients with injuries at T6 or above, necessitating blood pressure monitoring and possible pretreatment with nifedipine.

Electroejaculation (EEJ)

EEJ uses a rectal probe to deliver electrical stimulation to the prostate and seminal vesicles. It usually requires general anesthesia unless the patient has a complete spinal cord injury. After the procedure, the bladder is catheterized to check for retrograde ejaculated sperm. EEJ has a success rate exceeding 90% for inducing ejaculation, though sperm quality is often poor with low motility, requiring assisted reproductive techniques such as intrauterine insemination (IUI) or IVF/ICSI.

Retrograde Ejaculation

Retrograde ejaculation is diagnosed when sperm are found in post-ejaculate urine. Treatment involves oral sympathomimetics such as pseudoephedrine 60 mg four times daily or imipramine 25-50 mg three times daily. If medical treatment fails, sperm can be recovered by collecting post-ejaculate urine after alkalinizing the bladder with sodium bicarbonate, allowing for subsequent use in IUI or IVF.

<image>Transrectal ultrasound image showing dilated seminal vesicles and ejaculatory duct obstruction, with corresponding cystoscopic view during TURED procedure</image>

Clinical Pearls

Microsurgical subinguinal varicocelectomy remains the gold standard for varicocele repair due to its exceptionally low recurrence and hydrocele rates, both under 1%. In vasectomy reversal, the choice between vasovasostomy and vasoepididymostomy is made intraoperatively based on vasal fluid analysis, and surgeons should always be prepared to perform vasoepididymostomy even when vasovasostomy is planned. Obstructive intervals longer than 15 years and female partner age over 35 years significantly reduce the success rates of reversal, making IVF or ICSI potentially more efficient alternatives. Micro-TESE is superior to conventional TESE for non-obstructive azoospermia, offering higher sperm retrieval rates and less tissue damage. It is essential to discontinue exogenous testosterone at least six months before sperm retrieval, as it suppresses spermatogenesis; hormonal recovery support should be provided during this period. In cases of congenital bilateral absence of the vas deferens, CFTR genetic testing is mandatory for both the patient and partner prior to sperm retrieval and IVF/ICSI. Hormonal optimization with agents such as clomiphene, hCG, and anastrozole for 3-6 months before micro-TESE can improve sperm retrieval success.

References

• AUA/ASRM Guideline on Male Infertility, 2020 (amended 2024)
• EAU Guidelines on Male Infertility, 2024 Update
• Schlegel PN. "Testicular sperm extraction: microdissection improves sperm yield." Fertil Steril. 1999;72(2):355-357.
• Goldstein M, et al. "Microsurgical management of male infertility." Nat Clin Pract Urol. 2006.
• Esteves SC, et al. "Sperm retrieval techniques for assisted reproduction." Hum Reprod Update. 2013.
• Campbell-Walsh-Wein Urology, 12th Edition, Chapters on Male Infertility and Microsurgery

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