Description (Edit): Medical animation of egg fertilization from www.medflix.com
1. Fertilization
When the sperm find the egg, the first one to penetrate the egg creates a barrier to all the other sperm. The cells of the fertilized egg (zygote) begin to multiply, staying clustered together in a ball. This ball of cells, called a blastocyst, slowly makes its way down to the uterus (three or four days after ovulation) and burrows into the uterine wall (five to seven days after ovulation), a process known as implantation. Even before the placenta and umbilical cord are formed, the cells of the developing embryo start getting their nourishment from the mother-to-be's uterine wall.
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Description (Edit): Medical animation of egg fertilization from www.medflix.com
1. Fertilization
When the sperm find the egg, the first one to penetrate the egg creates a barrier to all the other sperm. The cells of the fertilized egg (zygote) begin to multiply, staying clustered together in a ball. This ball of cells, called a blastocyst, slowly makes its way down to the uterus (three or four days after ovulation) and burrows into the uterine wall (five to seven days after ovulation), a process known as implantation. Even before the placenta and umbilical cord are formed, the cells of the developing embryo start getting their nourishment from the mother-to-be's uterine wall.
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