Testicular sperm aspiration (TESA) is a needle-based procedure used to collect sperm directly from the testicle. The recovered sperm are generally used with IVF and intracytoplasmic sperm injection (ICSI), because the number obtained is usually too small for conventional insemination.
TESA is not the right procedure for every man with azoospermia. Its suitability depends mainly on whether sperm production is preserved but blocked, known as obstructive azoospermia, or severely impaired, known as non-obstructive azoospermia. Choosing the retrieval method before confirming this distinction can reduce the chance of finding sperm and expose the patient to an unnecessary procedure.
TESA expertise with Dr. Arun Muthuvel in Chennai
Dr. Arun Muthuvel is an MCh-qualified reproductive medicine and surgery specialist in Chennai. His approach to TESA combines male infertility diagnosis, selection of the least invasive suitable retrieval technique, coordination with the embryology laboratory, and planning of the female partner’s IVF-ICSI cycle.
Expertise in sperm retrieval is not only about performing the needle procedure. It includes deciding when TESA is appropriate, when PESA, TESE, reconstruction, or micro-TESE may be better, and whether sperm should be used fresh or frozen for a later cycle.
What Is TESA?
During TESA, a fine needle is passed through the scrotal skin into the testicle under anaesthesia. Gentle suction obtains small fragments of seminiferous tubules and testicular fluid. An embryologist processes the sample and searches it under a microscope for usable sperm.
If sperm are found, they may be injected into mature eggs during the same IVF-ICSI cycle or cryopreserved for future use. TESA does not improve sperm production and does not treat the cause of azoospermia; it is a method of obtaining sperm when they cannot be used reliably from the ejaculate.
Who May Be Suitable for TESA?
TESA may be considered in selected situations, including:
- Obstructive azoospermia: sperm production is expected to be preserved, but a blockage prevents sperm from reaching the semen
- Congenital absence of the vas deferens: usually after appropriate CFTR testing and genetic counselling
- Post-vasectomy infertility: when the couple chooses sperm retrieval with IVF-ICSI instead of, or alongside, reconstructive surgery
- Failed epididymal retrieval: when PESA does not obtain adequate sperm
- Selected ejaculatory disorders: when induced ejaculation or recovery from post-ejaculatory urine is unsuccessful or unsuitable
- Backup retrieval: in carefully planned circumstances when an ejaculated sample cannot be provided or usable sperm are unexpectedly unavailable
Is TESA Recommended for Non-Obstructive Azoospermia?
Usually not. In non-obstructive azoospermia (NOA), sperm production may occur only in small, scattered areas of the testicle. A blind needle aspiration can easily miss these areas. Current male-infertility guidance recommends microdissection testicular sperm extraction (micro-TESE) rather than TESA for men with NOA who are candidates for surgical sperm retrieval.
Dr. Arun Muthuvel first evaluates the likely cause of azoospermia and avoids presenting TESA as a universal or simpler substitute for micro-TESE. The correct procedure is the one matched to the diagnosis.
Evaluation Before TESA
A responsible TESA plan begins before the day of surgery. Assessment may include:
- At least two properly performed semen analyses when azoospermia is being confirmed
- Medical, surgical, reproductive, and family history
- Examination of testicular size, epididymis, and vas deferens
- FSH, testosterone, and other hormone tests when indicated
- Genetic testing for selected men, including CFTR testing when the vas deferens is absent and karyotype or Y-chromosome testing in appropriate severe sperm-production disorders
- Review of medicines, blood-thinning treatment, allergies, and infection risk
- Parallel fertility evaluation of the female partner so retrieval and IVF timing are appropriate
A diagnostic biopsy alone is usually avoided when a therapeutic sperm retrieval can be planned at the same time.
TESA Procedure: What Happens?
- Preparation: the diagnosis, consent, anaesthesia plan, laboratory availability, and fresh or frozen strategy are confirmed.
- Anaesthesia: local anaesthesia is commonly used, with sedation considered according to the patient and treatment setting.
- Aspiration: after sterile preparation, a needle is passed into the testicle and small tissue fragments are gently aspirated.
- Immediate laboratory assessment: the sample is passed to the embryologist, who separates the tubules and examines them for sperm.
- Completion: pressure and scrotal support are applied. If the sample is inadequate, the next step depends on the diagnosis and the pre-agreed backup plan.
The exact duration and number of sampling sites vary. More punctures are not automatically better, because repeated sampling may increase bleeding and tissue injury.
Why Embryology Coordination Matters
Surgical technique and laboratory expertise work together. Immediate feedback from an experienced embryologist can confirm whether adequate sperm have been found, prevent unnecessary additional sampling, and guide freezing. Dr. Arun Muthuvel plans TESA as part of the IVF-ICSI pathway rather than as an isolated procedure.
Fresh or Frozen TESA Sperm?
In obstructive azoospermia, sperm retrieval can often be performed before the IVF cycle and suitable sperm frozen. This can confirm that sperm are available before ovarian stimulation and avoids forcing both partners’ procedures to occur on the same day. Fresh retrieval may still be chosen in some circumstances.
Current guidance supports either fresh or cryopreserved surgically retrieved sperm for ICSI when adequate viable sperm survive processing and thawing. The choice depends on the diagnosis, expected sperm yield, laboratory advice, and the couple’s treatment plan.
TESA Recovery and Aftercare
TESA is often a day-care procedure. Mild soreness, swelling, or bruising can occur. Patients may be advised to use scrotal support, apply a cold pack as directed, take prescribed pain relief, avoid strenuous activity, and pause sexual activity for the period recommended by the surgeon.
Seek medical review for increasing swelling, severe pain, fever, wound discharge, spreading redness, difficulty passing urine, or symptoms that do not improve as expected.
Risks and Limitations
Potential risks include:
- Pain, bruising, swelling, or a scrotal haematoma
- Infection
- Temporary inflammation or discomfort
- Damage to testicular tissue or blood supply, which is uncommon
- Failure to obtain usable sperm
- Need for another retrieval technique or a future procedure
TESA cannot guarantee sperm retrieval, fertilisation, pregnancy, or live birth. The likelihood of success depends strongly on the diagnosis, and IVF outcomes also depend on egg quality, female age, embryo development, uterine factors, and laboratory performance.
TESA, PESA, TESE and Micro-TESE: What Is the Difference?
| Procedure | Where sperm are collected | Typical role |
|---|---|---|
| PESA | Epididymis by needle | Selected obstructive azoospermia |
| TESA | Testicle by needle | Selected obstruction, failed PESA, or planned backup |
| TESE | Testicle through a small incision | When an open tissue sample is appropriate |
| Micro-TESE | Testicular tubules selected under magnification | Preferred surgical retrieval approach for NOA |
Frequently Asked Questions
Is TESA painful?
Local anaesthesia is used to reduce procedural pain. Pressure or pulling may still be felt, and mild soreness can continue for a short period afterward. Anaesthesia and pain-relief plans should be individualised.
Can TESA sperm be used for IUI?
Testicular sperm are generally immature in movement and recovered in limited numbers, so they are usually used with IVF-ICSI rather than IUI.
Can TESA be performed before the IVF cycle?
Yes, particularly in obstructive azoospermia when a useful number of sperm is expected and the laboratory considers freezing appropriate. This can confirm availability before the female partner begins treatment.
Does TESA lower testosterone?
A limited aspiration is less extensive than open testicular surgery, but no procedure is risk-free. Men with small testes, low testosterone, previous retrievals, or impaired testicular function need individual counselling and follow-up.
Why consult Dr. Arun Muthuvel for TESA in Chennai?
Dr. Arun Muthuvel’s MCh training in reproductive medicine and surgery allows the retrieval decision to be integrated with azoospermia diagnosis, genetic evaluation, embryology, and both partners’ fertility treatment. The aim is to use TESA when it fits the diagnosis and choose a more appropriate technique when it does not.
The Bottom Line
TESA is a useful, minimally invasive sperm-retrieval procedure for carefully selected men, especially when sperm production is preserved but sperm cannot reach the ejaculate. Dr. Arun Muthuvel provides specialist TESA evaluation and IVF-ICSI coordination in Chennai, with the retrieval method tailored to the cause of infertility.
This article provides general medical information and does not replace individual diagnosis, consent, or surgical advice. Sperm-retrieval and IVF outcomes vary with male diagnosis, female factors, laboratory performance, and clinical circumstances.