Mesa-Pesa

PESA or MESA (Epididymal Sperm Aspiration) techniques are used to collect sperm in men who have a blockage of the epididymis, after a vasectomy or in the absence of the vas deferens.

There are cases in which the patient has no sperm in the ejaculated semen sample, but they are present in the reproductive tissues. In these cases, certain interventions can be performed to capture the sperm from these tissues, such as PESA (Percutaneous Epididymal Sperm Aspiration) and MESA (Micro Epididymal Sperm Aspiration).

Depending on the concentration of spermatozoa observed, their motility, as well as the number of cells present in the sample, this can be used for IUI, IVF or ICSI treatments.