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| Figure 1: Capacitation process. A) After ejaculation, a heterogeneous population of sperm reaches the female reproductive tract. B) Only a few sperm achieves the oviduct and forms the Sperm Reservoir (SR) in the caudal portion of the isthmus. C) During peri-ovulatory time, sperm release from the SR and those who complete a correct sperm capacitation are able to contact with the oocyte and fertilize it. Different colours indicate distinct types of sperm: dead (grey), damaged (red), normal (blue), hyperactivated (green-blue) and successfully capacitated (green). |
