Image GalleryNine-Cell Embryo |
![Nine-Cell Embryo [Click for next image]](http://media.ehd.org/images/prenatal_numbered_491/nine-cell-embryo.jpg "Click for next image")
| Source: Centro Riproduzione Assistita, Catania, Italy. |
Note:It is becoming more difficult to count the number of cells as more of them are out of focus when looking through the microscope.Note:The zona pellucida is appearing relatively thinner with time.Label Key:
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| All ages referenced to fertilization, not last menstrual period. |
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Nine-Cell Embryo
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Ten-Cell Embryo
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Morula: Twelve-Cell Embryo
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The Human Morula
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Early Blastocyst
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Blastocyst
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