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The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
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Blood Cells and Bone Marrow


3 months, 3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Bis 15 Wochen erscheinen Blut bildende Stammzellen und vermehren sich im Knochenmark. Die Blutbildung findet überwiegend hier statt.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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Gender Differences
Gender Differences
Tooth Development Begins
Tooth Development Begins
Blood Cells and Bone Marrow
Blood Cells and Bone Marrow
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4D Ultrasound
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4D Ultrasound
4D Ultrasound
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