A cortical granule migrates from Golgic apparatus to the vitelline surface, assuming a position 0.
Distribution of cortical granules in bovine oocytes classified by cumulus complex.
Development of the competence of bovine oocytes to release cortical granules and block polyspermy after meiotic maturation.
Although we expected crushing force to increase at fertilization due to the cortical granule
reaction, mean crushing force was significantly greater in unfertilized chorions than in fertilized chorions.
This event is thought to be a weak blocking against polyspermy, because the classic cortical reaction initiated by cortical granule exocytosis could not be observed in this species.
We could not observe other morphological changes of the inseminated egg during abalone fertilization, such as exocytosis of the cortical granules and the elevation of vitelline envelope, as seen in fertilized sea urchin eggs, in which an altered vitelline envelope prevented the binding of other sperm (Carroll & Epel 1975).
Damage may also be present in both the zona pellucida and cortical granules of these oocytes," she said.
In addition, she has round that the use of intracytoplasmic sperm injection (ICSI) to fertilize oocytes has been a "crucial" improvement in that it bypasses the damage to the zona pellucida and cortical granules and increases fertilization rates.
At the same stage, lipid droplets that were surrounded by the mitochondria and well-developed rough endoplasmic reticulum appeared near the cortical granules and exogenous substances.
many glycogen particles appeared outside the oolemma, and the cortical granules appeared at the cortical region.