The technique used for aspiration of sperm directly from testes for in vitro feilization is
MESA and TESA are both techniques of sperm aspiration but since the question specifically asks about aspiration directly from the testes, TESA is the most appropriate answer here.Ref: Clinical Gynecologic Endocrinology and Infeility; 8th edition; Section IV; Infeility
TESA
MESA
GIFT
IVF
Infertility