Image GalleryZygote |
![Zygote [Click for next image]](http://media.ehd.org/images/prenatal_unlabeled_491/zygote.jpg "Click for next image")
 From The Biology of Prenatal Development. |
Label Key:
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| All ages referenced to fertilization, not last menstrual period. |
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Zygote
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Human Zygote
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The Zygote
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Two-Cell Human Embryo
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Two-Cell Embryo
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Three-Cell Embryo
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