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Tesa / Pesa / Microtese

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in Fertility Care

A simple procedure where a fine needle is inserted into the testicle to aspirate (suction out) fluid and tissue containing sperm.
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Tesa / Pesa / Microtese

What is Tesa (Testicular Sperm Aspiration) ?

A simple procedure where a fine needle is inserted into the testicle to aspirate (suction out) fluid and tissue containing sperm.

What is Pesa (Percutaneous Epididymal Sperm Aspiration) ?

A needle is passed through the scrotal skin into the epididymis (where sperm mature and are stored) to aspirate sperm-containing fluid.

What is Micro Tese (Microdissection Testicular Sperm Extraction) ?

A highly precise version of TESE using a surgical microscope to identify and remove only the sperm-producing parts of the testis.
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When is Tesa Considered ?

Used when sperm are being produced but not released into ejaculate due to a blockage (obstructive azoospermia), or after vasectomy.

When is Pesa Considered ?

Ideal for men with obstructive azoospermia (e.g., after vasectomy) but normal sperm production.

When is Micro Tese Considered ?

Reserved for men with very low or no sperm production (severe non-obstructive azoospermia) where finding sperm is challenging.

Types of IVF Treatment

Tesa Type

  • Needle-based aspiration directly from the testicle.

Pesa Type

  • Needle aspiration from the epididymis.

Micro Tese Type

  • Microsurgical, targeted testis exploration and tissue retrieval.

Step Process

Procedure

Step 1 : Procedure of Tesa
  • Performed under local anesthesia. A needle is passed into the testis, and material is suctioned into a syringe. Takes about 10 minutes.
  • Performed under local anesthesia; takes about 10 minutes.
  • Microsurgical, targeted testis exploration and tissue retrieval.

Results of Tesa

Quick and minimally invasive; useful when sperm production is normal but release is blocked. Samples can be used immediately for ICSI or frozen.

Results of Pesa

Fast, low-risk, good for immediate sperm retrieval for IVF/ICSI.

Results of Micro Tese

Higher success in retrieving sperm compared to standard TESE, with reduced tissue damage. Ideal when prior methods failed.