Conception to Birth

Multidimensional Human Embryo Link


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The following shows some of the many stages of human development:



Zygote =




The single cell that results from fertilization of an ovum by a sperm.

Morula =




The morula is a solid ball of cells comprised of 16 64 cells. The morula results from numerous mitotic divisions (cleavage). During this stage of development, the

Blastocyst =



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.

Embryo =




The human is considered an embryo from implantation until about 8 weeks after conception.

Fetus =




8 weeks after conception until birth.


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