Abstract
The female genital tract performs a particular sperm analysis, identifying and selecting the best sperm for fertilization. This in vivo analysis seeks to ensure that the offspring receives the best genetic material. Through artificial sperm selection, natural barriers along the female tract are skipped.Conventional selection techniques used in assisted reproduction are based on sperm motility and morphology, not distinguishing between fecundating ability or genetic normality.The object of advanced sperm selection techniques is to retrieve the spermatozoa with better functional characteristics for intracytoplasmic sperm injection or in vitro fertilization. The introduction of these techniques in the andrology laboratory might represent a qualitative leap in assisted reproduction results.
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