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Azoospermia and surgical sperm retrieval
No sperm found in your semen? Understand azoospermia, the tests you may need, sperm retrieval options and their limits.
A report saying “no sperm seen” can make the question feel settled before anyone has explained it. Can you still have a child using your own sperm? Is there a blockage? Does this mean an operation? Those are reasonable questions. The report on its own cannot answer them.
Azoospermia means that no sperm are found in the semen. It describes a finding, rather than its cause. Some people make sperm but have a blockage that stops them reaching the semen. Others have a problem with sperm production. The next step is to confirm the result and work out which explanation fits.
There may be a way to collect sperm directly from the reproductive tract. That is called surgical sperm retrieval. It is an option for some people, and it has limits: sperm may not be found, and finding sperm does not guarantee a pregnancy or a baby. Sometimes another treatment makes more sense. Sometimes the most useful conversation is about alternatives.
I want you to understand the decisions before you encounter a list of operations and acronyms. This guide explains the assessment, the difference between a blockage and a production problem, what sperm retrieval involves, and how it fits with fertility treatment. For the wider picture, start with my guide to fertility assessment. Here, the focus is the specific result in front of you: no sperm found, and what to do next.
First, make sure the result has been confirmed
An initial report of no sperm needs a repeat semen analysis. Ask the clinician who arranged your test to organise the repeat promptly; a result suggesting azoospermia should not simply be left for the usual interval used for less severe changes. Specialist assessment can be arranged while confirmation is being completed.
The laboratory also needs to look carefully for very small numbers of sperm. It may spin the sample in a centrifuge and examine the concentrated material under a microscope. Occasionally, sperm are found only after that more detailed search. That finding changes the discussion, including whether there may be sperm to store without an operation.
Follow the laboratory's collection instructions and say if part of the sample was missed. Bring both reports to the appointment, rather than just a message saying the count was zero. My semen analysis guide explains what the test measures and why the full report matters.
A blockage and a production problem need different plans
Medical Evidence
European Association of Urology: male infertility guideline.
Source:UROWEB.ORG
NICE NG257: investigating fertility problems, published March 2026.
Source:
PIF TICK accredited information
The Patient Information Forum is the UK membership organisation and network for people working in health information and support. The PIF TICK is the UK-wide Quality Mark for Health Information.
Author Mr Giangiacomo Ollandini Published 17 October 2026Last update 17 October 2026Next review 17 October 2028Version v1.0
This content has been produced for educational purposes and reflects current evidence-based practice. Although GGO Med Ltd is a private urology service, all patient information is compiled with the aim of being accurate, evidence-based, and free from commercial bias. If you feel this content does not meet that standard, we would welcome your feedback — please contact us here.
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In obstructive azoospermia, sperm are being made but cannot travel into the semen. A previous vasectomy is one possible cause. Others include scarring after infection or surgery, or being born without the tubes that carry sperm from the testicles. The location and cause of the blockage help determine whether repair or sperm retrieval is worth considering.
In non-obstructive azoospermia, the problem is with making sperm. Causes include genetic conditions, damage after some cancer treatments, and problems with the hormonal signals that support sperm production. Sometimes the assessment does not identify a clear cause. There may still be small areas making sperm inside a testicle, but an operation cannot create sperm where none are being produced.
The amount of fluid you ejaculate does not tell you how many sperm it contains. A normal-looking ejaculation therefore does not rule out azoospermia. Equally, a hormone result or scan is only part of the assessment. No single reassuring number should replace an explanation of the whole picture.
The assessment needs to explain the cause, not just repeat the label
The review brings together your medical and reproductive history, an examination and test results. Relevant details include previous pregnancies, childhood testicular problems, infections, operations, cancer treatment and medicines. Mention testosterone therapy, anabolic steroids and supplements openly. Testosterone taken as treatment can suppress sperm production; it is not a treatment for infertility. Discuss prescribed treatment with your clinician before changing it. There is more background in TRT and fertility.
Blood tests commonly assess testosterone and the hormones that signal to the testicles, including follicle-stimulating hormone (FSH) and luteinising hormone (LH). Imaging may help answer a particular question raised by the history or examination. These tests help guide the plan; they do not provide a dependable yes-or-no prediction that sperm will be found during surgery.
Genetic testing can matter before a decision about retrieval. Depending on the findings, this may include a karyotype, which checks chromosomes, testing for missing sections of the Y chromosome, or CFTR testing where the sperm-carrying tubes are absent. CFTR is the gene associated with cystic fibrosis. Not everyone needs the same tests.
A result may help explain the infertility, change whether surgery is appropriate, or identify something that could be passed to a child. Some genetic findings mean retrieval should not be attempted. You should have the meaning of any proposed test explained before consenting, with genetic counselling where appropriate.
An operation is one option, rather than the starting assumption
If there is a repairable blockage, reconstructive surgery may offer a route for sperm to return to the semen. The alternative may be to collect sperm and use them in assisted conception. The site of the blockage, your preferences, the fertility assessment of the person providing eggs, and the time involved all affect that choice.
Some hormonal causes can be treated medically under specialist supervision. That is different from routinely giving hormones to everyone before sperm retrieval. The diagnosis should explain why a treatment is being offered and what it is expected to change.
If a varicocele is found, it needs its own assessment. An enlarged vein does not by itself establish that repairing it will solve azoospermia. The varicocele and fertility guide explains the broader discussion. Decisions about retrieval should stay tied to your confirmed diagnosis and the fertility plan.
What PESA, MESA, TESA, TESE and micro-TESE mean
These names describe where and how sperm are collected. The epididymis is the coiled tube beside a testicle where sperm mature and are stored. The testicle is where sperm are made. A procedure suited to a blockage may be unsuitable when production is the problem.
PESA — percutaneous epididymal sperm aspiration: a needle passes through the scrotal skin to collect fluid from the epididymis. It may be used when there is a blockage.
MESA — microsurgical epididymal sperm aspiration: the surgeon uses an operating microscope to collect fluid from the epididymis through an incision. It is another option for selected obstructive cases.
TESA — testicular sperm aspiration: a needle collects material from a testicle. It can be an option with obstruction; it is not the recommended retrieval approach for non-obstructive azoospermia.
TESE — testicular sperm extraction: small samples of testicular tissue are removed through an incision and examined for sperm.
Micro-TESE — microdissection testicular sperm extraction: an operating microscope helps the surgeon select areas of testicular tissue that may contain sperm. The European Association of Urology (EAU) favours this approach for suitable cases of non-obstructive azoospermia. Its recommendation is weak, and the evidence comparing techniques has limitations.
Needle procedures may use local anaesthetic, sometimes with sedation. Open or microsurgical procedures may need general anaesthetic. The surgeon and anaesthetist should explain the proposed operation, the anaesthetic, and any agreed change of technique before you consent. The laboratory team then examines the collected fluid or tissue for usable sperm.
Finding sperm is only one part of trying for a pregnancy
Surgically collected sperm are generally used with intracytoplasmic sperm injection (ICSI), a form of IVF in which an embryologist injects a sperm into an egg. Retrieval is therefore planned with the fertility clinic and its laboratory. It is not a separate operation after which a pregnancy follows automatically.
The plan needs to address whether sperm will be frozen for later use or collected alongside egg treatment. Cryopreservation means freezing and storing sperm. Not all sperm survive freezing and thawing, and the laboratory's assessment matters when numbers are small. Consent, screening, storage arrangements and what happens if no usable sperm are found should be agreed beforehand.
There are separate uncertainties at each stage: finding sperm, fertilising eggs, embryo development, pregnancy and live birth. ICSI can help fertilisation, but eggs can be damaged during the process and the wider risks of IVF still apply. The fertility team should discuss those risks and the implications of any genetic cause of infertility with you.
Ask for outcomes relevant to your diagnosis and the proposed technique. A clinic's overall pregnancy rate is not your chance of sperm retrieval. A retrieval rate is not your chance of a baby.
Risks and recovery deserve the same attention as the hoped-for result
Bruising, swelling and discomfort can follow retrieval. Other risks include bleeding or a collection of blood in the scrotum, infection and persistent testicular pain. Testicular damage or shrinkage and a fall in testosterone are also possible. The anaesthetic has its own risks. Your team should explain which risks apply to your procedure and health, rather than treating every technique as interchangeable.
Follow the written recovery advice from the team doing the operation. Ask about pain relief, supportive underwear, wound care, work, driving, exercise and sex before going home. Recovery depends on the procedure and your work; a single timetable cannot cover a needle aspiration and a more extensive micro-TESE.
If pain, bruising or swelling is getting worse rather than settling, contact your surgical team for advice. Fever, feeling unwell, spreading redness or pus from a wound need prompt medical advice from the surgical team or a GP. If you cannot reach them, use NHS 111. Use the discharge contact instructions rather than waiting for the next fertility appointment.
Follow-up should cover the laboratory result, healing and the next fertility decision. Testosterone follow-up may also be needed after testicular sperm extraction, particularly if you develop symptoms such as reduced sex drive or ongoing fatigue. Ask who will arrange that review.
Decide what you want to know before deciding what to do
Bring your reports and a list of medicines to a specialist review. Ask what the likely cause is, what still needs confirming, and whether the proposed next step would change the treatment plan. If surgery is discussed, ask what happens both if sperm are found and if they are not.
Donor sperm is another option to discuss with a licensed fertility clinic. Adoption, taking time away from treatment, or choosing not to pursue treatment may also be right for you. Counselling can help you consider these choices before or after a procedure; you do not have to wait for a failed attempt to ask for support.
You do not need to arrive knowing which acronym to request. You need an explanation of the result, a plan that fits its cause, and space to decide what the possible benefits and burdens mean for you.
Make sense of your result
Bring your semen analysis reports to a consultation so we can discuss the assessment and your options.
It does not answer that question on its own. Some people have sperm behind a blockage; some with a production problem have small areas from which sperm can be retrieved. Others will not have usable sperm available. Confirming the result and assessing the cause helps establish which options are realistic. No procedure can guarantee a baby.
Not automatically. Micro-TESE is considered for suitable cases where sperm production is impaired. A blockage may call for a different retrieval procedure or a discussion about repair. A treatable hormonal problem may call for medical treatment. The cause and the wider fertility plan come before the choice of operation.
The team should explain the laboratory findings and whether any further assessment or attempt has a reasonable basis. Another operation is not an automatic next step. You can discuss donor sperm, other family-building options, counselling, or stopping treatment. Agreeing how an unsuccessful retrieval would affect any planned egg treatment is part of preparing for surgery.
It assesses damage to DNA in sperm; it does not replace confirming whether sperm are present or assessing the cause of azoospermia. It has different indications and uncertainties. My DNA fragmentation guide explains what it can and cannot tell you. Ask which question an additional test would answer before arranging it.
