Conception to Birth
Multidimensional Human Embryo Link
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The following shows some of the many stages of human development:
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Zygote = |
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The single cell that results from fertilization of an ovum by a sperm. |
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Morula = |
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The morula is a solid ball of
cells comprised of 16 à 64 cells. The morula results from numerous mitotic
divisions (cleavage). During this stage of development, the |
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Blastocyst = |
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The blastocyst is a liquid-filled
ball of cells. This stage of development occurs around 5 – 8 days after
conception. Implantation in the endometrium
occurs at this stage. |
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Embryo = |
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The human is considered an
embryo from implantation until about 8 weeks after conception. |
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Fetus = |
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8 weeks after conception until birth. |
