Structural and functional events on the porcine zona pellucida during maturation, fertilization and embryonic development: a scanning electron microscopy analysis.

Abstract

Porcine oocytes and pre-implantation embryos from the same, as well as from different animals, have an extremely heterogeneous morphology of the zona pellucida (ZP) surface, as shown by scanning electron microscopy. For years, it has been believed that this heterogeneous morphology plays an important role in the sperm-oocyte interaction. The aim of this… (More)

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