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The Endowment for Human Development
The Endowment for Human Development
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Twins at Play

#422, Slide 43 of 74

10 weeks

From The Biology of Prenatal Development.Buy Now

Label Key:

1. left arm, upper twin
2. head, lower twin
3. chest, lower twin
4. abdomen, upper twin
5. head, upper twin
All ages referenced to fertilization, not last menstrual period.
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