Mammalian Fertilization Misread? Sperm Penetration of the Eutherian Zona Pellucida Is Unlikely to be a Lytic Event

Abstract excerpt

Spermatozoa and oocytes of many eutherian (placental) mammals, including the human, are now manipulated successfully in a variety of ways for reasons having to do particularly with human infertility and domestic animal production, as well as basic research. Even so, several evolutionarily novel features of their function and form largely defy explanation still [1]. Most obvious in the male is the absolute...

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