Thailand TESE/ICSI Technology Explained: Suitable Candidates, Process, and Realistic Analysis
Opening: Real Consultation Scenario
"I'm 36 years old and have been married for 4 years without a child. I've had three semen analyses, all showing 'no sperm after centrifugation.' Last month, I had a testicular biopsy in my home country, and the pathology report stated 'impaired spermatogenesis.' The doctor said my chances of finding sperm with TESE are low and suggested considering donor sperm. I don't want to give up easily. I'm wondering if going to Thailand for TESE/ICSI could help find sperm. Is it worth trying?"
— A real consultation from a male client, reflecting the core confusion many face when dealing with azoospermia.
Module A: Direct Answer to the QuestionWhat is TESE/ICSI Technology?
TESE (Testicular Sperm Extraction) is a minimally invasive surgical procedure to retrieve sperm directly from testicular tissue for use in assisted reproduction. ICSI (Intracytoplasmic Sperm Injection) involves injecting a single sperm directly into an egg to achieve fertilization. Used together, they are the mainstream technological approach for treating infertility caused by male azoospermia.
In Thailand, TESE/ICSI is not a "new technology" but a standard procedure routinely performed in many fertility centers. The technology itself is fundamentally no different from that in leading global fertility centers. The key lies in the laboratory's experience in handling minimal/frozen sperm and the adequacy of pre-operative assessment regarding the probability of finding sperm.
When is TESE/ICSI Considered?
The core indication for TESE/ICSI is azoospermia, meaning no sperm is found after repeated examination of centrifuged semen. Azoospermia is divided into two main types, with completely different causes and TESE outcomes.
Obstructive Azoospermia
Spermatogenesis in the testicles is normal, but there is an obstruction in the reproductive tract (epididymis, vas deferens, etc.) preventing sperm from being ejaculated. For these patients, the probability of finding sperm via TESE is over 90%, making them the ideal candidates for TESE/ICSI.
Non-obstructive Azoospermia
Spermatogenesis within the testicles is impaired, which can be focal or complete spermatogenic failure. For these patients, the probability of finding sperm via TESE ranges from 30% to 60%, depending on indicators such as FSH, inhibin B, and testicular volume. Higher FSH, lower inhibin B, and smaller testicular volume correlate with a lower probability of finding sperm.
Additionally, a history of testicular cancer, chemotherapy/radiotherapy, or Y-chromosome microdeletions (AZFc region) can also cause azoospermia and requires evaluation based on the specific cause.
Module G: Most Easily Overlooked DetailsMost Easily Overlooked Pre-operative Assessment Indicators
Many people focus only on "which hospital to go to" or "how much it costs," overlooking the key factor determining TESE success: detailed pre-operative assessment. The following indicators directly affect the probability of sperm retrieval via TESE and determine whether the attempt is worthwhile.
FSH (Follicle-Stimulating Hormone) and Inhibin B
FSH is an indirect indicator of testicular spermatogenic function. Significantly elevated FSH (typically >15-20 IU/L) suggests severely impaired spermatogenesis. Inhibin B is secreted by Sertoli cells in the testicles; lower levels indicate poorer spermatogenic function. Combining both provides a more accurate assessment than FSH alone.
Testicular Volume
Testicular volume is a direct visual indicator of spermatogenic function. Normal adult male testicular volume is approximately 15-25ml. When volume is <8ml, the probability of finding sperm via TESE decreases significantly. When volume is <5ml, the possibility of finding sperm is extremely low.
Genetic Screening
Y-chromosome microdeletions (AZF deletions) and Klinefelter syndrome (47,XXY) are common genetic causes of azoospermia. Certain types of AZF deletions (e.g., AZFb or AZFb+c) make finding sperm nearly impossible, rendering TESE pointless. Completing genetic testing before surgery can avoid unnecessary trauma and expense.
An easily overlooked point: Testicular aspiration (FNAC) and TESE are two different procedures. Aspiration uses a fine needle to extract a small amount of tissue, while TESE involves making an incision in the tunica albuginea to remove a larger piece of tissue. Failure to find sperm via aspiration does not mean TESE will also fail. However, if aspiration pathology shows "severely impaired spermatogenesis" and FSH is very high, the success rate of TESE is also limited.
Module I: Actual ProcessComplete Process of TESE/ICSI in Thailand
The following process is based on standard procedures in Thai fertility centers. Details may vary slightly between hospitals, but the overall framework is consistent.
| Stage | Specific Details | Key Notes |
|---|---|---|
| Pre-operative Assessment | Semen analysis, FSH, Inhibin B, AMH, testicular volume, karyotype, Y-chromosome microdeletion, infectious disease screening | Takes approximately 2-4 weeks; some tests can be done in home country |
| Ovarian Stimulation | Female partner undergoes ovarian stimulation, follicle growth monitoring, HCG or GnRH agonist trigger 36 hours before egg retrieval | Requires staying in Thailand for about 12-14 days |
| TESE Surgery | Under general or local anesthesia, incision in tunica albuginea, removal of pea-sized testicular tissue, microscopic search for sperm | Surgery time about 30-60 minutes; rest for 1-2 days post-op |
| Sperm Processing | Found sperm is enzymatically digested, washed, used for ICSI; remaining sperm can be cryopreserved | Some Thai centers have experience with minimal sperm freezing |
| ICSI Procedure | Single sperm injected into mature egg; fertilization observed | Fertilization rate approximately 50-70%, depending on sperm and egg quality |
| Embryo Culture & Transfer | Culture to blastocyst stage (day 5-6), PGT (optional), transfer or freezing | Pregnancy test 12-14 days after transfer |
| Luteal Phase Support | Progesterone medication used to support luteal function after transfer | Continue until pregnancy test; if pregnant, continue support until 10-12 weeks |
TESE surgery itself is minimally traumatic; patients can usually get out of bed the same day, but rest for 1-2 days is recommended. Testicular swelling and mild pain are normal reactions, typically subsiding within 1-2 weeks.
Module J: Time PlanningTime Planning and Schedule
For TESE/ICSI in Thailand, the total stay typically requires 18-24 days. This is divided into two main phases:
- Female Ovarian Stimulation Phase: Approximately 12-14 days (from day 2 of menstruation to egg retrieval)
- TESE + ICSI + Embryo Culture: Approximately 3-6 days (TESE surgery is usually on the same day as egg retrieval or one day before)
- Transfer & Pregnancy Test: If transferring a fresh embryo, an additional 5-6 days is needed; if freezing all embryos, you can return home first and schedule a frozen embryo transfer later
It is recommended to complete all pre-operative tests 1-2 weeks in advance to ensure all reports are ready. If opting for a frozen embryo transfer, the second trip to Thailand only requires about 10-12 days (endometrial preparation + transfer + pregnancy test).
Module M: Case Scenario AnalysisCase Scenario Analysis for Different Situations
Situation 1: Obstructive Azoospermia (Ideal TESE Candidate)
A 32-year-old male with azoospermia, FSH 5.2 IU/L, normal inhibin B, testicular volume 20ml, normal karyotype. Sperm is easily found during TESE, ICSI fertilization rate is about 65%, resulting in transferable blastocysts. In this situation, good outcomes can be achieved both in Thailand and domestically; the key is the laboratory's embryo culture proficiency.
Situation 2: Non-obstructive Azoospermia (Requires Careful Evaluation)
A 38-year-old male, FSH 22 IU/L, low inhibin B, testicular volume 8ml, Y-chromosome AZFc deletion. Probability of finding sperm via TESE is about 40-50%, and sperm quality may be poor, affecting the ICSI fertilization rate. This situation requires thorough communication of risks and having a psychological and medical plan for the possibility of "no sperm found."
Situation 3: Is Repeat TESE Worth It After Previous Failed Aspiration?
Some patients have had one or more failed testicular aspirations in their home country, but this does not mean TESE will definitely fail. Aspiration samples a limited amount of tissue, whereas TESE can retrieve more. However, the prerequisite is that the assessment indicators have not deteriorated extremely. If FSH >25 and testicular volume <6ml, repeating TESE is of little value.
