Image GallerySperm |
![Sperm [Click for next image]](http://media.ehd.org/images/prenatal_numbered_491/sperm.jpg "Click for next image")
| Source: Centro Riproduzione Assistita, Catania, Italy. |
Label Key:
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| All ages referenced to fertilization, not last menstrual period. |
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Sperm
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Secondary Oocyte
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Single-Cell Embryo
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Zygote
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Human Zygote
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The Zygote
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