Hatching During the process of hatching, which occurs at around day 6 of development, the embryo emerges from the rigid shell in which it has been encased. Cervical mucus may prevent sperm from passing into the egg meet sperm, but during ovulation when the egg is released from the ovaries, the mucus gets thinner and lower in pH. Hundreds of millions of sperm vie for a single egg cell.
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Here, it will begin to move slowly down the tube towards the womb uterus. Millions of candidates set off on a long and perilous journey egg meet sperm a single target at the end, and if the candidates reach their target, something completely unique is created. When the sperm and egg fuse it triggers a release of calcium ions, which cause the egg meet sperm granules inside the egg to fuse with the plasma membrane.
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