Sperm Retrieval for Azoospermia: TESA, TESE and Micro-TESE
Azoospermia: what does it mean?
Azoospermia means that sperm are not found in the ejaculate after an appropriate semen examination. It is an important finding, but it is not a complete explanation on its own. The team first confirms the result and then asks why sperm are absent.
The EAU recommends a full andrological assessment and careful examination of the concentrated semen sample. This can help distinguish true azoospermia from cryptozoospermia, where very small numbers of sperm may be found after centrifugation and microscopic review.EAU male infertility guideline
The first decision: obstructive or non-obstructive?
This distinction guides the conversation about sperm retrieval. It is based on the semen findings, medical history, examination, hormone results and, when indicated, genetic tests — not on one number alone.AUA/ASRM evaluation guideline
| Type | What may be happening | What the team may discuss |
|---|---|---|
| Obstructive azoospermia (OA) | Sperm production may be present, but a blockage prevents sperm from reaching the ejaculate. | Retrieval from the testis or epididymis, or reconstruction of the blockage in selected cases. |
| Non-obstructive azoospermia (NOA) | Sperm production inside the testis is reduced, patchy or absent. | A detailed andrological/genetic work-up and, when retrieval is appropriate, discussion of micro-TESE. |
The table is a map, not a personal treatment plan. The same label can have different causes, and the plan must also consider both partners’ treatment timing.
TESA, TESE and micro-TESE: how do they differ?
The procedure is chosen after the diagnosis is clarified. In obstructive azoospermia, sperm may be retrieved from the testis or epididymis. For men with NOA who undergo surgical retrieval, the AUA/ASRM guideline recommends microdissection TESE (micro-TESE).AUA/ASRM treatment guideline
| Method | What it involves | Where it is usually discussed |
|---|---|---|
| TESA | A needle is used to aspirate testicular tissue or fluid. | Selected obstructive cases, depending on the examination and laboratory plan. |
| Epididymal retrieval | Sperm are collected from the epididymis, the structure where sperm mature and are stored. | Obstruction, when the epididymis is a suitable source. The exact technique may be PESA or MESA. |
| TESE | A small sample of testicular tissue is removed through an incision and examined in the laboratory. | Selected cases where testicular tissue sampling is appropriate. |
| Micro-TESE | An operating microscope helps the surgeon search for tubules more likely to contain sperm. | Confirmed NOA when surgical retrieval is planned. It still cannot guarantee that sperm will be found. |
These procedures are not different levels of the same “upgrade”. They answer different clinical questions. More complex surgery is not automatically more useful.
What should be checked before retrieval?
Before surgery, the team usually reviews the semen reports, medical and surgical history, physical examination and hormone results. Testicular volume, the presence of the vas deferens, previous surgery and the pattern of the semen findings may all change the next step.EAU male infertility diagnostic guidance
Genetic testing is selected according to the findings. In appropriate cases of azoospermia or very severe sperm-production impairment, this may include a karyotype and Y-chromosome microdeletion testing. CFTR-related testing may be discussed when congenital absence of the vas deferens or another obstructive pattern is suspected. Genetic counselling helps explain what a result means for retrieval, future children and the wider family.AUA/ASRM evaluation guideline
Genetic results can change the plan. They are not a formality to complete after the operation has already been arranged.
Anaesthesia, recovery and possible limits
TESA, TESE and micro-TESE are performed with anaesthesia or sedation according to the technique, the centre’s protocol and your medical assessment. Your team should explain fasting, medication instructions, the expected recovery and when to ask for help.
After the procedure, temporary aching, swelling or bruising can occur. Follow the written aftercare instructions and contact the team if you have heavy bleeding, fever, worsening pain or another symptom that concerns you. The possibility of complications, including infection, bleeding or an effect on testicular function, belongs in the consent discussion. The AUA/ASRM guideline also notes that testosterone deficiency requiring treatment remains a possible risk even after micro-TESE.AUA/ASRM treatment guideline
How is retrieved sperm used in IVF?
Sperm obtained during surgery may be used fresh or cryopreserved for ICSI when there are enough viable sperm and the laboratory can use them successfully after thawing. The AUA/ASRM guideline recognises both fresh and cryopreserved sperm as options for ICSI.AUA/ASRM treatment guideline
The retrieval may be coordinated with the partner’s egg collection, or it may take place earlier with a plan for freezing. If no sperm is found, the cycle may need to be paused while the team reviews the diagnosis and the next available option. Finding sperm is an important laboratory step; it does not by itself guarantee fertilisation, embryo development or pregnancy.
A typical treatment pathway
The order differs between couples, but a plan may include:
- Review and testing: the pre-IVF assessment and male-factor work-up clarify the diagnosis.
- Planning the timing: the team coordinates retrieval with egg retrieval or prepares a freezing plan.
- Sperm retrieval: TESA, epididymal retrieval, TESE or micro-TESE is selected according to the findings.
- Laboratory fertilisation: retrieved sperm are usually used with IVF and ICSI, rather than with unassisted fertilisation in the laboratory.
- Embryo planning: embryos may be considered for embryo transfer or cryopreservation according to the medical plan.
If you are travelling to Türkiye, the local rules matter as much as the medical plan. The clinic’s IVF in Türkiye guide explains the framework for treatment with the couple’s own gametes. Donor sperm is not offered within this clinic’s Türkiye treatment framework; this should be clarified before travel, not after a procedure has been scheduled.
Dr. Aksoy’s approach
I do not start with the name of a procedure. I first want to know whether the azoospermia is confirmed, whether the pattern is obstructive or non-obstructive, and whether the genetic and hormonal information changes the plan. In NOA, micro-TESE may be the guideline-supported surgical discussion; in OA, epididymal or testicular retrieval and reconstruction may each have a place. The important part is to explain what the procedure can achieve, what it cannot answer and where uncertainty remains.
Frequently asked questions
Does azoospermia mean that sperm retrieval is impossible?
No. The outlook depends mainly on whether the azoospermia is obstructive or non-obstructive, along with the medical, hormonal and genetic findings. A retrieval procedure can still fail, so no individual result can be promised in advance.
Which sperm retrieval method is used for obstructive azoospermia?
When sperm production may be intact but the reproductive tract is blocked, the team may discuss retrieval from the testis or epididymis, or repair of the obstruction in selected cases. TESA is one possible approach; it is not an automatic choice for every patient.
Is micro-TESE always necessary?
No. Micro-TESE is mainly discussed when non-obstructive azoospermia has been confirmed and surgical retrieval is planned. Obstructive cases are usually assessed with different retrieval or reconstruction options.
Can retrieved sperm be frozen?
Fresh or cryopreserved sperm may be used for ICSI when enough viable sperm are available and survive thawing. The laboratory and clinical team decide whether retrieval should be coordinated with egg collection or done earlier.
What happens if no sperm is found?
The team reviews the semen results, diagnosis, genetics and operative findings before discussing the next step. In Türkiye, donor sperm is not offered within the clinic’s treatment framework, so legal and medical limits should be explained before travelling.
Sources
- American Society for Reproductive Medicine and American Urological Association. Diagnosis and treatment of infertility in men: AUA/ASRM guideline part II.
- American Society for Reproductive Medicine and American Urological Association. Diagnosis and treatment of infertility in men: AUA/ASRM guideline part I.
- European Association of Urology. Male infertility guideline.
For education only. This page does not replace an individual assessment by a qualified fertility or andrology team.
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