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The Endowment for Human Development
The Endowment for Human Development
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Age of Viability


5 months, 1 week

From The Biology of Prenatal Development.Buy Now
All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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Responds to Sound
Responds to Sound
Skin and Hair
Skin and Hair
Age of Viability
Age of Viability
4D Ultrasound
4D Ultrasound
Blink-Startle Response
Blink-Startle Response
Somersaults
Somersaults
Buy the Biology of Prenatal Development DVD
When does health begin? Find out now.


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