Many azoospermic patients with nonobstructive azoospermia (NOA) might be candidates for sperm aspiration as part of their in vitro fertilization procedure. Because sperm might be present in some but not all parts of the testes of such men, multiple samplings of the testicular tissue are usually performed to increase the probability of finding sperm in NOA patients. These samplings can be done by 2 methods: 1) TESE (testicular sperm extraction), which is actually a surgical biopsy of the testis; or 2) TESA (testicular sperm aspiration), which is performed by sticking …

Testicular Sperm Aspiration (TESA): A needle is passed through the scrotal skin into the testicle. With syringe suction and numerous excursions of the needle through the testicle tissue, a very small amount of testicular tissue can be retrieved. In the case of obstruction, it will …