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Which Period Involves the Formation of Extraembryonic Membranes, the Placenta

Question 1

Multiple Choice

Which period involves the formation of extraembryonic membranes, the placenta, and the period of organogenesis?


A) They occur during the period of implantation.
B) They occur during the blastomere stage.
C) They occur during the third trimester.
D) They occur during the embryonic period.

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