Ovulation

• At ovulation, the secondary oocyte is released:

  • The secondary oocyte is frozen at metaphase of the 2nd meiotic division

• Accompanying the secondary oocyte:

  • Corona radiata (same as cumulus oophorus) ñ follicular cells that accompanied the ovum during ovulation
  • Zona pellucida ñ right next to ovum; extracellular matrix proteins that form a barrier assuring species-specific fertilization only

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