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The Endowment for Human Development
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Hand Plates and Cartilage


5 weeks, 6 days

From The Biology of Prenatal Development.Buy Now

Script: Also by 5 weeks, the embryo develops hand plates, and cartilage formation begins by 5 1/2 weeks.

Here we see the left hand plate and wrist at 5 weeks and 6 days.

All ages referenced to fertilization, not last menstrual period.
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