•Electrical activity of the embryo's heart recorded at 7 1/2 weeks reveals a wave pattern similar to the adult's.
•By 7 1/2 weeks fingers are separate and toes are joined only at the bases.
•The 8-week embryo possesses more than 90% of the structures found in adults.
•The 8-week embryo possesses more than 90% of the structures found in adults.
~ From the Endowment for Human Development fact sheet ~
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