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The Endowment for Human Development
The Endowment for Human Development
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Blood Cells and Bone Marrow


3 months, 3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Do końca 15. tygodnia, krwiotwórcze komórki macierzyste docierają i zaczynają się namnażać w szpiku kostnym. Większość komórek krwi powstanie w tym właśnie miejscu.

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
4D Ultrasound
4D Ultrasound
4D Ultrasound
4D Ultrasound
4D Ultrasound
4D Ultrasound
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