Microsurgical Epididymal Sperm Aspiration (MESA)
Microsurgical Epididymal Sperm Aspiration (MESA)
This technique may be done by itself or during reconstruction surgery for a blockage. An incision is made in the skin of the scrotum and the testicle is exposed. An operating microscope allows the surgeon to see the epididymis (the tube through which sperm travel after leaving the testicle) under magnification. Fluid from the epididymis is examined for sperm that move. If moving (motile) sperm are seen, the fluid is taken for immediate use or frozen for future use.