MicroTESE - Microsurgical Sperm Retrieval

MicroTESE is recommended for men with non-obstructive azoospermia (NOA) where no sperm are found in the ejaculate due to impaired production rather than a blockage. Candidates include men with: Klinefelter syndrome (47,XXY), idiopathic NOA (unknown cause), post-chemotherapy or post-radiotherapy azoospermia, maturation arrest (sperm development fails partway), and Sertoli-cell-only syndrome (partial). Before MicroTESE, Y-chromosome microdeletion testing is mandatory - AZFa or AZFb deletions predict near-zero chance of sperm retrieval and MicroTESE is not recommended in these men.

The overall sperm retrieval rate with MicroTESE in NOA is 40–60%. This varies by underlying cause: idiopathic NOA: 40–50%; Klinefelter syndrome: 40–50% (younger age and testosterone optimisation improve rates); AZFc microdeletion: ~50%; maturation arrest: 30–50% depending on level; Sertoli-cell-only syndrome: 20–30%. These rates are significantly better than conventional TESE (16–45%) because the microscope allows targeted extraction from tubules with higher sperm density.

TESA (testicular sperm aspiration) uses a needle to aspirate testicular tissue - appropriate for obstructive azoospermia but has very low yield in NOA. Conventional TESE takes random biopsy cores blindly - retrieval rates in NOA are lower (16–45%) and significantly more testicular tissue is removed, risking testosterone decline. MicroTESE uses an operating microscope (×16–25) to visually identify tubules that appear dilated and opaque - these are more likely to contain sperm. Substantially less testicular tissue is removed (0.5–1g vs 5g+ with conventional TESE), less vascular damage occurs, and testosterone recovery post-operatively is better preserved.

Retrieved sperm are handed directly to the embryology laboratory. They can be used immediately for same-day IVF-ICSI (intracytoplasmic sperm injection) if the female partner has undergone concurrent ovarian stimulation and egg retrieval. Alternatively - and often preferably - sperm are cryopreserved (frozen) in multiple vials for future IVF cycles. This allows the female partner's ovarian stimulation to be timed and optimised independently. Even a very small number of sperm are sufficient for ICSI - a single sperm per egg is all that is needed.

In approximately 40–60% of NOA cases, MicroTESE does not retrieve viable sperm. This is a difficult outcome and is discussed sensitively before and after the procedure. The couple's options include: trying with donor sperm via IVF, adoption, or accepting childlessness. Before any MicroTESE, a clear pre-operative counselling session establishes realistic expectations, and both possible outcomes are discussed. Dr. Nitin believes in honest, compassionate communication - ensuring couples are prepared for both results before proceeding.

MicroTESE is performed under general anaesthesia. The scrotal incision is small - approximately 2–3 cm. Post-operatively there is mild to moderate scrotal discomfort, managed with oral analgesics (ibuprofen, paracetamol). Most men return to desk work within 5–7 days. Scrotal support is worn for 2 weeks. Strenuous activity and intercourse are avoided for 4 weeks. Unlike conventional TESE, the limited tissue removal in MicroTESE means recovery is generally smooth. A follow-up testosterone check at 3 months confirms hormonal recovery.