File:Stage 1.JPG: Revision history

From Embryology

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3 September 2009

  • curprev 14:2514:25, 3 September 2009Z3218657 talk contribs 143 bytes +143 Shown here in the zygote is the development as the chorion swells and lifts away from the fertilized egg. Photo supplied by Judy Cebra-Thomas