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The Endowment for Human Development
The Endowment for Human Development
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Slideshow: Facial Expressions

The Thinker

#409, Slide 6 of 31

10 weeks

From The Biology of Prenatal Development.Buy Now

Label Key:

1. closed right hand
2. elbows
3. forehead
All ages referenced to fertilization, not last menstrual period.
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