What is PESA / MESA?
PESA (percutaneous epididymal sperm aspiration) and MESA (microsurgical epididymal sperm aspiration) collect sperm from the epididymis for ICSI, most often in obstructive azoospermia. PESA uses a needle through the skin; MESA uses microsurgical exposure of epididymal tubules to aspirate sperm for ICSI or freezing.








