ABSTRACT
Teratozoospermia, asthenozoospermia and necrozoospermia are frequently responsible for infertility in men, and have a negative influence on the fertility prognosis when assisted reproductive technologies (ART), including in vitro fertilization (IVF), are attempted. The introduction of intracytoplasmic sperm injection (ICSI) allowed examination of the motility and morphology of the very same spermatozoon that was to be microinjected. It then became clear that abnormal and immotile spermatozoa could successfully fertilize oocytes, and the issue of the convenience of using them in ART procedures was raised. Some andrologists have stressed the importance of using different tools to characterize sperm pathologies and establish a diagnosis; still others have been more inclined to use spermatozoa in ICSI without paying much attention to the nature of the pathologies involved.
