Definitions for "Percutaneous epididymal sperm aspiration"
a surgical technique in which immature sperm are taken directly from the epididymis for use in ART.
Aspiration of sperm from the epididymus.
A procedure in which sperm are removed from the epididymis, a long coiled tube above each of the testes, through a needle. PESA allows a physician to extract a small amount of sperm from a man who, for any number of reasons, is not able to ejaculate enough healthy sperm. A downside to PESA is that it collects a relatively small sample of sperm.