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Cell Division |
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Note: And so it begins! Script: Approximately 24 to 30 hours after fertilization, the zygote completes its first cell division. Through the process of mitosis, one cell splits into two, two into four, and so on. | ||
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All ages referenced to fertilization, not last menstrual period.
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Cell Division
( 48 hours) |
Amnion and Germ Layers
( 7 days) |
The Folding of the Embryo
( 3 weeks) |
The Heart in Action
( 4 weeks, 4 days) |
Hand Plates and Cartilage
( 5 weeks, 6 days) |
Hand Movement
( 6 weeks, 6 days) |
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