Скачать или смотреть Fertilization conception process in 3D animation / conception explained

The fertilization process starts when a sperm cell from a male's reproductive system meets an egg cell from a female's reproductive system in the fallopian tube. The sperm cell penetrates the egg cell's protective outer layer, and once the sperm cell's nucleus and the egg cell's nucleus fuse together, a zygote is formed.
After the zygote is formed, it undergoes a series of cell divisions, called cleavage, as it travels down the fallopian tube towards the uterus. During this time, the zygote is also protected by the zona pellucida, a layer that surrounds the developing embryo.
Once the zygote reaches the uterus, it implants itself into the lining of the uterus, and begins to receive nutrients and oxygen from the mother's blood vessels through the placenta.
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