[Ultrastructure and function of mitochondria in idiopathic asthenospermia: study of 151 cases].

Objective: To explore the ultrastructure and function of mitochondria in idiopathic asthenospermia and the role thereof in the sperm activity.

Methods: Samples of sperm were collected from 151 idiopathic asthenospermia patients, 25% of whose sperms were classified as lower than grade A, were subdivided into 3 groups: Group A with the proportion of grade A sperms between 15% and 25%, Group B, with the proportion of grade A sperm between 15% and 5%, and Group C with the proportion of grade A sperm < 5%. Transmission electron microscopy was used to observe the ultrastructure of the mitochondria in the sperms.