PESA (Percutaneous epididymal sperm aspiration)
Some men produce no sperm at all in their ejaculate. In these cases, sufficient sperm can sometimes be obtained by testicular sperm aspiration to treat their partner's eggs with ICSI. The procedure involves an insertion of a fine needle under general anaesthesia so that the sperm may be sucked out into a syringe from a small tube at the back of the testis. Sometimes it is necessary to put the needle actually into the testes itself. Any sperm obtained may be used fresh, or frozen for later use in ICSI.