DEVICE TO SELECTION OF CAPACITATED SPERMATOZOA

The present invention describes a device and a method for sperm selection based on the chemical attraction that sperm possess in vitro to some biofluids, like follicular fluid (FF). The main novelty of the procedure is that capacitated and attracted sperm come into contact with the FF and acquire, through the exosomes, certain substances that increase their fertilizing capacity. On the other hand, the device also has the properties to allow fertilization to occur in the same place where the sperm areselected, which leads to a decrease in possible epigenetic alterations that are produced by the environment during the manipulation of gametes. This device, and the associated method, offer the possibility of examining an elite sperm population that can be used for uterine artificial insemination (AI), intracytoplasmic sperm injection (ICSI) and in vitro fertilization (IVF), as well as in studies on sperm fertility. It can also be used in other species for IVF and for studies on sperm functionality as basic science.