TESA, PESA, and MicroTESE are surgical procedures that retrieve sperm directly from the testicle or epididymis when none is found in the semen. The right one is decided by the cause: for a blockage (obstructive azoospermia), a simple needle procedure finds sperm in almost every man; where the testicle struggles to make sperm (non-obstructive azoospermia), MicroTESE is the recommended technique, and it succeeds in roughly half of cases.
All three are ways of collecting sperm surgically for use in ICSI (intracytoplasmic sperm injection, where a single sperm is injected into an egg). They differ in where the sperm is taken from and how much searching is involved. PESA (percutaneous epididymal sperm aspiration) and TESA (testicular sperm aspiration) are quick needle procedures. MicroTESE (microdissection testicular sperm extraction) is an open microsurgical procedure that examines testicular tissue under a microscope. The names matter less than the principle behind them: the procedure is matched to the cause, not chosen from a menu.
Before choosing a procedure, one question must be answered: Is the problem a blockage or a production problem? This single distinction determines which operation is appropriate and, honestly, how likely it is to work. In obstructive azoospermia, the testicles make sperm normally but a blockage stops it reaching the semen, so sperm is almost always there to be found. In non-obstructive azoospermia, the testicle itself produces little or no sperm, so the search is harder and success is not guaranteed. This is the gap most online summaries skip over, and it is set out more fully in our guide to azoospermia and zero sperm count. A specialist works out which type is present from examination, hormone tests and, where needed, genetic tests- not from the procedure name a patient has read about.
Matching the procedure to the cause is what separates a reliable plan from a wasted operation. Here is how the choice is made, with the success figures stated plainly rather than blended into a single reassuring number.
Where sperm production is normal, and the problem is a blockage- after a vasectomy, a failed vasectomy reversal, a congenital absence of the vas deferens, or an infection-related blockage- PESA or TESA is usually all that is needed. These are quick needle procedures, and the chance of finding sperm in obstructive azoospermia is close to 100%. If a PESA does not yield enough sperm, a TESA on the same day almost always does. There is rarely any reason to put a man with a clear blockage through a larger operation.
This is where the choice matters most, and where competitor summaries are often misleading. When the testicle struggles to make sperm, a blind needle TESA samples only a tiny, random amount of tissue and misses the rare pockets where sperm may be hiding- its yield in non-obstructive azoospermia is low (around 10-20%). MicroTESE, by contrast, opens the testicle and searches systematically under a microscope, targeting the fuller tubules most likely to contain sperm. The international guidelines (AUA/ASRM and EAU) are explicit: for non-obstructive azoospermia, the recommended technique is MicroTESE. Across the published evidence, it finds sperm in about half of men (roughly 52%, versus around 35% for conventional non-microscopic extraction), and with a lower complication rate. The honest message is that MicroTESE gives the best possible chance- not a guarantee- and that the right operation, done once and done well, matters more than the choice of a clinic’s marketing.
Because non-obstructive retrieval is roughly a coin toss, a proper assessment beforehand is part of doing it honestly. Hormone levels (FSH and testosterone), testicular volume, and a couple of confirmed semen analyses help estimate the odds. Genetic tests matter too: certain Y-chromosome microdeletions mean sperm are very unlikely to be found, so identifying them in advance can spare a couple an operation that is unlikely to succeed. A specialist who orders these tests first is protecting you from a procedure with little chance of working, not adding unnecessary steps.
Within non-obstructive azoospermia the odds also depend on what the tissue shows: where some sperm production is present (hypospermatogenesis) success is high, while in Sertoli-cell-only or maturation-arrest patterns, it is lower. None of this can be known with certainty before the operation, which is why the figure is honestly given as a range rather than a promise.
Surgical retrieval is considered when no sperm are found on at least two semen analyses (a lab test of the ejaculate). The underlying reasons fall into two groups:
• Obstructive causes: a previous vasectomy, a failed vasectomy reversal, congenital absence of the vas deferens (the tube that carries sperm), or a blockage from past infection or surgery. Sperm production is intact.
• Non-obstructive causes: Sertoli-cell-only pattern, maturation arrest (sperm development stalls), Klinefelter syndrome, prior chemotherapy or radiotherapy, or an undescended testicle (cryptorchidism) in childhood. Sperm production is reduced or absent.
It can also be offered to men with retrograde ejaculation (semen passing backward into the bladder) when simpler measures have not worked. In every case, the goal is the same: find enough sperm to fertilise eggs through ICSI.
Anaesthesia and the day of the procedure
• PESA and TESA: minor, quick (often 10-30 minutes), and usually done under local anaesthesia or light sedation as a day-care procedure. No incision or stitches are needed, so most men go home the same day.
• MicroTESE: a longer microsurgical operation, usually under general anaesthesia, with a small scrotal incision. It is still typically day-care or a short stay, but recovery is a little more involved than a needle procedure.
Recovery is generally quick. To let the area heal and reduce swelling, men are usually advised to:
• Rest and support: take it easy for 24-48 hours, wear supportive underwear, and use a cold pack and simple pain relief for soreness.
• Avoid strain: no heavy lifting, vigorous exercise, cycling or sexual activity for about one to two weeks (longer after MicroTESE), as advised by the surgical team.
• Watch for warning signs: increasing pain, significant swelling, redness or fever should be reported promptly, as they can signal bleeding or infection.
Most men return to desk work within a few days after PESA or TESA, and within about a week after MicroTESE.
Cost reflects the complexity of the procedure: needle procedures are the least expensive, while MicroTESE is a microsurgical operation and therefore more expensive. The diagnostic tests that establish the type of azoospermia are modest, and they are what tell you which procedure is appropriate- so they are rarely wasted spending. The figures below are indicative; exact pricing for your city, centre and the technique chosen is confirmed at consultation.
The most expensive procedure is not automatically the right one. Paying for a MicroTESE when a man has a simple blockage adds cost without benefit; equally, choosing a cheaper needle TESA for non-obstructive azoospermia risks a failed operation and a second procedure. The cost that matters is the cost of the correct procedure for your diagnosis.
Surgically retrieved sperm is always used with ICSI, because the numbers and movement are too low for conventional IVF- a single healthy sperm is injected directly into each egg. The sperm can be used fresh on the day the partner’s eggs are collected, or frozen for a later cycle; guidelines accept both. For couples, the reassuring point is that a baby conceived this way is not at a disadvantage from how the sperm was obtained: where a sperm is healthy, fertilisation and pregnancy outcomes are comparable to ejaculated sperm.
If azoospermia has been found, book a fertility consultation with a Cloudnine andrologist and reproductive urologist to confirm the type, run the right workup, and choose the procedure that fits your diagnosis. Our guide to the causes of male infertility sets out the wider picture.