This procedure is very similar to a MESA, but only a local anaesthetic is required. The surgeon uses a small needle to aspirate sperm directly from the epididymas, which, as in the MESA procedure is taken back to the RMU laboratory to be frozen and used at a later date or used immediately during an ICSI cycle.
Sperm
It is possible to freeze sperm prior to a treatment cycle, so as to ensure that there is sufficient sperm available at the time of your partners egg collection. Sperm can also be frozen …

Although reports on microsurgical epididymal sperm aspiration with IVF appeared in the literature as early as 1984, the first live birth was not reported until 1990. As it was first described, the procedure of microsurgical epididymal sperm aspiration involved careful dissection of the epididymis under the operating microscope and incision of a single tubule.
Once incised, fluid spills from the epididymal tubule and pools in the epididymal bed. This pooled fluid is then aspirated. Because the epididymis is richly vascularized, this technique invariably leads to contamination by blood cells that may …