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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: Sa 15 na linggo, ang stem cells na gumagawa ng dugo ay darating at dumarami sa bone marrow. Karamihan sa pagbuo ng selula ng dugo ay nangyayari dito.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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