What Is Azoospermia?
Azoospermia is a medical condition in which no sperm cells are detected in the semen during laboratory analysis. It is considered one of the most serious causes of male infertility.
This condition affects approximately 1% of the general male population and around 10–15% of men experiencing infertility.
When azoospermia is diagnosed, a detailed medical evaluation is usually required. This evaluation may include:
- Hormone testing
- Genetic and chromosomal analysis
- Testicular examination
- Imaging studies if necessary
Chromosomal abnormalities are detected in approximately 10–15% of men with azoospermia, with Klinefelter Syndrome being one of the most commonly identified genetic conditions.
Causes of Azoospermia
Azoospermia can develop due to problems related to sperm production or obstruction in the reproductive ducts.
Several medical conditions may contribute to this condition.
Hormonal Disorders
Hormonal imbalances may disrupt the communication between the brain and the testicles that is necessary for sperm production.
Genetic Conditions
Certain genetic abnormalities may affect sperm development. In some patients, chromosomal mutations can be identified through specialized genetic testing.
Undescended Testicles (Cryptorchidism)
If the testicles do not descend properly during childhood, sperm production may be affected later in life.
Previous Surgeries
Surgical procedures performed during childhood for conditions such as inguinal hernia or undescended testicles may sometimes affect reproductive structures.
Infections Affecting the Testicles
Certain infections that cause inflammation of the testicles may damage sperm-producing tissue.
Examples include:
- Mumps infection during childhood
- Severe febrile illnesses affecting the testes
Cancer Treatments
Cancer treatments such as chemotherapy and radiation therapy may damage testicular tissue and reduce sperm production.
Trauma
Physical injuries may also affect fertility. These may include:
- Traffic accidents
- Sports-related injuries
Such injuries can damage the testicles and affect sperm production.
Obstruction of the Sperm Ducts
In some men, sperm production may be normal but the ducts that transport sperm are blocked.
Possible causes include:
- Congenital absence of the vas deferens
- Infection-related scarring
- Surgical complications
Genetic Evaluation in Azoospermia
Genetic abnormalities may be present in a portion of men diagnosed with azoospermia.
Genetic testing and chromosomal analysis can help identify these abnormalities.
When IVF treatment is planned, advanced genetic screening methods such as PGT (Preimplantation Genetic Testing) or NGS (Next Generation Sequencing) may be used to analyze embryos and reduce the risk of passing genetic conditions to the child.
Treatment Options for Azoospermia
Treatment for azoospermia depends on the underlying cause.
In many cases, doctors may attempt to retrieve sperm directly from testicular tissue through surgical techniques.
Surgical Sperm Retrieval Methods
Common procedures include:
- TESA (Testicular Sperm Aspiration)
- TESE (Testicular Sperm Extraction)
- Micro-TESE (Microsurgical Testicular Sperm Extraction)
If viable sperm cells are successfully retrieved, they can be used in IVF treatment with ICSI.
IVF with ICSI
With ICSI (Intracytoplasmic Sperm Injection), a single sperm cell is injected directly into the egg to achieve fertilization.
This technique allows pregnancy even in cases where sperm numbers are extremely low.
When No Sperm Can Be Found
In some cases, sperm cannot be retrieved even with surgical procedures.
If no sperm cells are detected in the testicular tissue, sperm donation may be considered as an alternative treatment option.
Sperm donation is an assisted reproductive technique in which sperm from a medically screened donor is used for fertilization during IVF treatment.
This method allows couples to achieve pregnancy even when the male partner has severe infertility.
