MESA (Microsurgical Epididymal Sperm)

MESA, or Microsurgical Epididymal Sperm Aspiration, is a procedure used to retrieve sperm directly from the epididymis—the tube where sperm mature and are stored after they are produced in the testes. It is typically performed to address male infertility issues related to *obstructive azoospermia*, where sperm is produced in the testes but cannot reach the ejaculate due to a blockage or absence of the vas deferens.​

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• When MESA Is Done?
  MESA is usually recommended when:
  - A man has obstructive azoospermia, often due to conditions such as a vasectomy, congenital absence of the vas deferens, or scarring from infections or previous surgeries.
  - In cases where the couple is planning in vitro fertilization (IVF) with intracytoplasmic sperm injection (ICSI).
  - The preference is for a method that yields a high number of sperm, allowing for multiple IVF cycles from a single retrieval procedure.

• Why MESA Is Done?
  MESA is done to retrieve mature sperm directly from the epididymis, allowing bypass of any obstructions in the reproductive tract. It’s usually performed under a microscope, which provides precision and increases the chances of retrieving high-quality sperm. This procedure often provides a larger quantity of sperm compared to other methods (like TESA), making it advantageous if the couple wishes to use the sperm for several IVF/ICSI attempts.

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The above information is for education purposes. Request to contact your doctor for best recommendations.