TESE Procedure and TESA: Sperm Retrieval for Azoospermia
What sperm retrieval is for
When there is no sperm in the ejaculate (azoospermia), sperm may still be obtained from the testis or epididymis for use with ICSI.
Azoospermia has two broad groups:
| Type | Core idea | Common retrieval approach |
|---|---|---|
| Obstructive | Production may be present; outflow is blocked | Often TESA / epididymal aspiration |
| Nonobstructive | Production itself is impaired | Often TESE or micro-TESE |
Genetic factors can contribute to both. Testing is part of a responsible workup before surgery.
TESA for obstructive azoospermia
TESA (testicular sperm aspiration) uses a fine needle to aspirate tissue or fluid. In obstructive azoospermia, sperm is often found because production may be intact. Exact yield still depends on the individual case and surgical findings — not a universal guarantee.
TESE procedure for nonobstructive azoospermia
A TESE procedure (testicular sperm extraction) is an open surgical sampling of testicular tissue to look for focal sperm production. In nonobstructive azoospermia, retrieval is less certain than in obstructive disease because production may be sparse or absent.
Micro-TESE uses an operating microscope to target more promising tubules. It is discussed separately when nonobstructive azoospermia is confirmed — see azoospermia and micro-TESE.
Retrieved sperm is typically used the same day for ICSI or frozen for later use, depending on lab practice and the female partner’s cycle plan. Fertilisation pathway: IVF and ICSI.
Genetic testing before retrieval
Azoospermia often warrants karyotype and Y-chromosome microdeletion testing (and CFTR-related testing when obstruction is suspected). Results can change counseling about retrieval chances, offspring risks, and whether surgical retrieval is appropriate.
Anesthesia and practical points
TESA and TESE are usually performed under anesthesia or sedation according to centre protocol. Preparation may include hormone panels, scrotal examination, and imaging when indicated. Aftercare typically involves rest, scrotal support, and clear instructions for bleeding, fever, or severe pain.
FAQ
Is azoospermia “curable”?
Some obstructive causes can be surgically repaired in selected men. Many couples proceed with sperm retrieval and ICSI rather than chasing a universal cure.
How often does a TESE procedure find sperm?
It depends on diagnosis, prior histology, hormone profile, and genetics. Obstructive cases generally have higher retrieval rates than nonobstructive ones. Your team should quote ranges that match your category — not a single website percentage.
Is genetic testing mandatory?
Strongly advised before irreversible reproductive decisions, especially in nonobstructive azoospermia.
Are these procedures painful?
They are performed under anesthesia or sedation to minimise discomfort. Mild postoperative aching is common.
Important limits
This page is educational. It does not replace individual andrology assessment. Retrieval success and fertilisation outcomes vary; no procedure guarantees pregnancy.
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