CONDITION OF NO SPERM IN THE EJACULATE, HAPPENS EITHER BECAUSE THERE IS A BLOCKAGE IN THE REPRODUCTIVE TRACT OR A DEFICIENCY IN SPERM PRODUCTION.

FOR MANY MEN WITH THIS TYPE OF INFERTILITY, A SURGICAL PROCEDURE IS NECESSARY TO EXTRACT SPERM DIRECTLY FROM THE EPIDIDYMIS, WHERE MATURE SPERM ARE STORED, OR THE TESTICLES, WHERE THEY ARE PRODUCED.

MESA/TESE procedures are recommended when the ejaculate contains no sperm, a low concentration of sperm, abnormally shaped sperm or sperm that is not fully developed.


MESA (Microsurgical Epididymal Sperm Aspiration)

Performed under general anesthesia, the MESA procedure involves direct retrieval of spermatozoa from the epididymal tubules with a syringe. The sperm concentration is then determined. If no sperm is present, the TESE procedure is performed.

TESE (Testicular Sperm Extraction)

The TESE procedure involves removing a small portion of tissue from the testicle. The extracted tissue is checked for sperm concentration.

Sperm obtained in these procedures is then prepared for ICSI (Intracytoplasmic Sperm Injection). If the sperm concentration is sufficient it is possible to freeze the surplus sperm for future use to avoid the surgical procedures.

MESA/TESE Indications

  • The ejaculate contains no sperm
  • A low concentration of sperm
  • Abnormally shaped sperm
  • Sperm that is not fully developed.
  • Vasectomy