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There are two different methods of Epididymal Sperm Aspiration. One method is done by withdrawing the sperm directly out of the epididymis by needle aspiration through the skin of the scrotum (see the image on the left- Percutaneous Epididymal Sperm Aspiration (PESA)). The second method is to make an incision through the scrotum, expose the epididymis so it can be clearly seen, and then collect the sperm (see the image on the right - Microsurgical Epididymal Sperm Aspiration (MESA)). A one-day stay at our hospital is required for this procedure. Although the percutaneous method (PESA) (through the skin) does not require surgery we recommend the second method (MESA) since it is more effective for collecting larger amounts of healthy sperm.
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