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The Endowment for Human Development
The Endowment for Human Development
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Cell Division


48 hours

From The Biology of Prenatal Development.Buy Now

Script: Etwa 24 bis 30 Stunden nach der Befruchtung, vollendet die Zygote ihre erste Zellteilung. Durch den Prozess der Zellkernteilung, teilt sich eine Zelle in zwei Teile, dann zwei in vier und so weiter.

All ages referenced to fertilization, not last menstrual period.
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Fertilization 1
Fertilization 1
Fertilization 2
Fertilization 2
Cell Division
Cell Division
The Morula and Blastocyst
The Morula and Blastocyst
3 Billion Base Pairs per Cell
3 Billion Base Pairs per Cell
Amnion and Germ Layers
Amnion and Germ Layers
When does health begin? Find out now.
Buy the Biology of Prenatal Development DVD


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