In which of the following procedures sperms are aspirated from the testes?

Aspiration of sperms from testes is done in Testicular sperm aspiration(TESA). In this technique, an aspiration needle is inseed percutaneously to the testis parenchyma to aspirate fluid or small pieces of seminiferous tubules to obtain sperm. Ref: Feility Cryopreservation By Ri-Cheng Chian, Page 52-3; Feility Preservation: Emerging Technologies and Clinical Applications By Emre Seli, page 305.