Surgical Sperm Retrieval: When Is It Needed and How Does It Work?
For some men with severe male infertility, sperm may not be present in the ejaculate even though sperm can still be found within the reproductive tract or testicular tissue.
This is particularly important in men with azoospermia, where no sperm are detected in the semen.
In selected cases, surgical sperm retrieval can provide sperm for use in assisted reproductive treatment, particularly intracytoplasmic sperm injection (ICSI).
The procedure chosen depends largely on why sperm are absent from the ejaculate.
Men with obstructive azoospermia may have sperm production that is relatively preserved, while men with non-obstructive azoospermia may have severely impaired sperm production.
The ESSM 2014 scientific programme included several presentations on sperm retrieval, micro-TESE, predictors of sperm retrieval and management after unsuccessful micro-TESE. ESSM 2014 Scientific Programme
Current EAU guidance also addresses surgical sperm retrieval as part of the management of selected men with azoospermia. EAU Male Infertility Guidelines
What Is Surgical Sperm Retrieval?
Surgical sperm retrieval refers to procedures used to obtain sperm directly from the male reproductive tract or testicular tissue.
The sperm can then potentially be used for assisted reproductive treatment.
Unlike a standard semen analysis, where sperm are obtained from an ejaculate, surgical retrieval attempts to obtain sperm directly from where they are stored or produced.
The procedure may involve:
The epididymis
The testicle
Testicular tissue
The appropriate technique depends on the underlying cause of infertility.
Who May Need Surgical Sperm Retrieval?
Surgical sperm retrieval is primarily considered when sperm cannot be obtained through ejaculation.
This can occur in men with:
Obstructive Azoospermia
Sperm production may be preserved, but an obstruction prevents sperm from reaching the semen.
Non-Obstructive Azoospermia
Sperm production is severely impaired, but small areas of sperm production may still exist within the testicles.
Certain Ejaculatory Disorders
Some men cannot produce an ejaculate containing sperm because of specific reproductive or neurological conditions.
In each situation, the approach to sperm retrieval can be different.
Why Is the Cause of Azoospermia Important?
Before deciding on sperm retrieval, the specialist needs to establish why sperm are absent from the semen.
This usually involves:
Repeat semen analysis
Medical history
Physical examination
Hormonal testing
Genetic testing when indicated
Assessment of testicular function
Imaging when clinically appropriate
The distinction between obstructive and non-obstructive azoospermia is particularly important.
Sperm Retrieval in Obstructive Azoospermia
In obstructive azoospermia, sperm production within the testicles may be relatively normal.
The problem is that sperm cannot reach the ejaculate.
This means sperm may potentially be retrieved from:
The epididymis
The testicle
Because sperm production is preserved in many cases of obstruction, retrieval can be highly effective when the appropriate technique is selected.
Possible procedures include PESA, MESA, TESA and TESE.
Sperm Retrieval in Non-Obstructive Azoospermia
Non-obstructive azoospermia is more challenging.
In this condition, sperm production is significantly impaired.
However, sperm production may not necessarily be completely absent.
Some men may have small areas of the testicle where sperm production continues.
The purpose of specialised retrieval techniques is to identify and obtain sperm from these areas when possible.
This is where micro-TESE can become particularly important.
What Are the Main Sperm Retrieval Procedures?
There are several techniques, and they are not interchangeable.
PESA
Percutaneous Epididymal Sperm Aspiration (PESA) involves using a fine needle to aspirate sperm from the epididymis.
It may be considered in selected men with obstructive azoospermia.
MESA
Microsurgical Epididymal Sperm Aspiration (MESA) uses microsurgical techniques to obtain sperm directly from the epididymis.
It may be useful when sperm production is preserved but sperm cannot reach the ejaculate.
TESA
Testicular Sperm Aspiration (TESA) involves using a needle to aspirate sperm directly from the testicle.
It can be considered in selected cases, particularly when sperm retrieval from the testicle is appropriate.
TESE
Testicular Sperm Extraction (TESE) involves removing a small amount of testicular tissue and examining it for sperm.
If sperm are found, they can potentially be used for ICSI.
What Is Micro-TESE?
Micro-TESE, or microsurgical testicular sperm extraction, is a specialised technique designed primarily for selected men with non-obstructive azoospermia.
Unlike conventional TESE, micro-TESE uses an operating microscope to help identify areas of testicular tissue that may contain sperm-producing tubules.
The surgeon carefully examines the testicular tissue and selectively removes areas that appear more likely to contain sperm.
The tissue is then examined by the laboratory team to identify viable sperm.
The ESSM 2014 programme included multiple scientific presentations on micro-TESE, including sperm retrieval outcomes and factors associated with successful retrieval. ESSM 2014 Scientific Programme
Why Is Micro-TESE Used in Non-Obstructive Azoospermia?
In non-obstructive azoospermia, sperm production may be extremely limited.
Instead of removing a larger amount of testicular tissue without knowing where sperm may be located, micro-TESE allows the surgeon to search more systematically under magnification.
The goal is to:
Identify areas more likely to contain sperm
Minimise unnecessary removal of testicular tissue
Maximise the chance of retrieving sperm
Preserve as much functional testicular tissue as possible
However, micro-TESE cannot guarantee that sperm will be found.
What Happens During Micro-TESE?
The exact procedure varies according to the individual patient and surgical team.
In general, the process involves:
Step 1: Preoperative Assessment
The patient's diagnosis, semen analyses, hormonal results and genetic investigations are reviewed.
Step 2: Anaesthesia
The procedure is performed under appropriate anaesthesia.
Step 3: Testicular Access
A small surgical opening is made to allow the surgeon to access the testicular tissue.
Step 4: Microscopic Examination
A surgical microscope is used to identify testicular tubules that may be more likely to contain sperm.
Step 5: Tissue Retrieval
Selected tissue samples are removed and immediately assessed by an embryology or laboratory team.
Step 6: Sperm Identification
The laboratory searches the tissue for viable sperm.
If sperm are found, they may be prepared for use in assisted reproduction.
What Happens to the Retrieved Sperm?
When viable sperm are identified, they can potentially be used for intracytoplasmic sperm injection (ICSI).
ICSI involves injecting a single sperm directly into an egg during an IVF treatment cycle.
This is particularly useful when only a small number of sperm are available.
Surgical sperm retrieval therefore does not usually mean that the retrieved sperm are used for conventional IVF without further intervention.
The reproductive team determines the most appropriate assisted reproductive technique.
Does Surgical Sperm Retrieval Guarantee Sperm?
No.
This is particularly important in non-obstructive azoospermia.
The possibility of finding sperm depends on multiple factors, including:
Underlying cause
Genetic findings
Hormonal profile
Testicular function
Previous treatments
Histological findings
Even with micro-TESE, sperm may not be found.
The ESSM scientific programme included discussion of failed micro-TESE and subsequent management, demonstrating that unsuccessful retrieval is a recognised clinical scenario requiring individualised planning. ESSM 2014 Scientific Programme
What Factors Affect Sperm Retrieval?
There is no single test that can perfectly predict whether sperm will be found.
However, the specialist may consider:
Hormonal Profile
FSH, LH and testosterone can provide information about testicular function.
Genetic Results
Certain genetic abnormalities can significantly affect the likelihood of sperm production.
Testicular Volume
Testicular size may provide additional information about sperm-producing capacity.
Cause of Azoospermia
Men with obstructive azoospermia generally have a different retrieval outlook from men with severe non-obstructive sperm-production problems.
Previous Retrieval
Previous unsuccessful sperm retrieval may influence the planning of any subsequent procedure.
What Are the Risks of Surgical Sperm Retrieval?
As with any surgical procedure, sperm retrieval carries potential risks.
These may include:
Pain
Swelling
Bleeding
Infection
Haematoma
Testicular injury
Temporary discomfort
In rare situations, significant effects on testicular function
The risk depends on the procedure performed and the patient's individual circumstances.
The potential benefits should therefore be weighed against the risks before proceeding.
How Long Does Recovery Take?
Recovery depends on the type of sperm retrieval performed.
Needle-based procedures may involve relatively limited recovery, while surgical procedures such as TESE or micro-TESE can require a longer period of healing.
Patients may experience:
Mild pain
Swelling
Bruising
Tenderness
The surgical team will provide specific instructions regarding:
Pain relief
Wound care
Physical activity
Sexual activity
Exercise
Follow-up
Can Sperm Retrieval Be Repeated?
In selected cases, another retrieval procedure may be considered.
However, repeating the procedure is not automatically appropriate.
The decision depends on:
Why the first procedure failed
The underlying diagnosis
Genetic findings
Hormonal status
The amount of testicular tissue previously removed
The specific retrieval technique used
A specialist should reassess the diagnosis before recommending another procedure.
What If No Sperm Are Found?
An unsuccessful retrieval can be difficult for patients and couples, particularly when biological fatherhood is an important goal.
The next step depends on the reason sperm were not found.
The specialist may review:
The original diagnosis
Genetic results
Hormonal profile
Previous surgical findings
Testicular histology
Whether another retrieval approach could be considered
Other reproductive options may also be discussed when sperm retrieval is unsuccessful.
These may include donor sperm or alternative family-building options, depending on the couple's circumstances and preferences.
Can Medication Improve the Chances of Sperm Retrieval?
In selected men, medical treatment may be appropriate when a reversible hormonal abnormality is identified.
However, medication should not be used indiscriminately before sperm retrieval.
External testosterone, in particular, can suppress sperm production and should not be considered a fertility treatment for men seeking to conceive. EAU Sexual and Reproductive Health Guidelines
Any hormonal treatment should therefore be directed by a specialist after proper evaluation.
Surgical Sperm Retrieval and IVF
Surgical sperm retrieval is often performed as part of an assisted reproductive pathway.
The process may look like:
Male fertility assessment↓Diagnosis of azoospermia↓Determine obstructive vs non-obstructive cause↓Select appropriate sperm retrieval technique↓Retrieve sperm if possible↓ICSI / assisted reproduction
This approach allows the treatment plan to be based on the underlying diagnosis rather than simply the absence of sperm in the ejaculate.
Is Micro-TESE the Same as TESE?
No.
Both procedures involve obtaining testicular tissue, but they use different techniques.
TESE
Testicular tissue is removed and examined for sperm.
Micro-TESE
The surgeon uses microscopic magnification to search more selectively for areas of the testicle that may contain sperm.
Micro-TESE is particularly relevant to selected cases of non-obstructive azoospermia.
The choice between techniques should be based on the individual diagnosis and the specialist's assessment.
When Should You Consider Surgical Sperm Retrieval?
A specialist may discuss surgical sperm retrieval if:
You have confirmed azoospermia.
You have obstructive azoospermia.
You have non-obstructive azoospermia.
Sperm cannot be obtained through ejaculation.
You are planning ICSI.
A previous fertility treatment requires surgically retrieved sperm.
Other medical or reproductive circumstances make sperm retrieval appropriate.
The first step should always be a complete diagnostic evaluation.
Surgical Sperm Retrieval: Key Takeaway
Surgical sperm retrieval can provide an important pathway to biological fatherhood for selected men with azoospermia.
The correct technique depends on the underlying cause.
For men with obstructive azoospermia, sperm may potentially be retrieved from the epididymis or testicle because sperm production may be preserved.
For selected men with non-obstructive azoospermia, micro-TESE may be used to search for areas of residual sperm production within the testicle.
However, no procedure guarantees that sperm will be found.
A detailed diagnosis, appropriate counselling and careful treatment planning are therefore essential.
Book a Male Fertility Consultation
If you have been diagnosed with azoospermia or have been told that sperm cannot be found in your semen, a specialist assessment can determine whether surgical sperm retrieval may be an option.
Book a consultation with Professor Amr Raheem to discuss azoospermia, sperm retrieval and fertility treatment.
References
European Society for Sexual Medicine (ESSM). 16th ESSM Congress Joint with the 12th EFS Congress – Final Programme, Istanbul, 2014. The programme includes scientific sessions on sperm retrieval, micro-TESE, predictors of sperm retrieval and management following unsuccessful micro-TESE. ESSM 2014 Congress Programme
European Association of Urology (EAU). EAU Guidelines on Sexual and Reproductive Health – Male Infertility. Current guidance on the evaluation and management of azoospermia and surgical sperm retrieval. EAU Male Infertility Guidelines
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