Multiple Choice
The process of implantation is usually complete by approximately:
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Implantation
Multiple Choice
The trophoblast eventually differentiates into two layers. Which of these layers erodes the endometrium and begins projecting extensions into the uterine lining?
A
The cytotrophoblast.
B
The syncytiotrophoblast.
C
The blastocyst.
D
The morula.
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