Assessment of spermatozoal function.

Different procedures have been developed to assess the functions of spermatozoa in terms of their motility as well as their fertilizing potential. The procedures for assessment of motility are either qualitative or quantitative, subjective or objective, while the procedures for assessment of fertilizing potential are either direct or indirect. In this review, the information available on the procedures are compiled and analysed including the procedures for in vitro penetration of zona-free hamster eggs by human or non-human primate spermatozoa.