Biology Forums - Study Force

 
In human reproduction, once conception and successful implantation have occurred,   
A)
 
CG secreted by the placenta simulates the activity of LH.   
B)
 
the corpus luteum continues progesterone and estrogen secretion for the first trimester.   
C)
 
the placenta eventually assumes the production of progesterone and estrogen.   
D)
 
all of the above   

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Thanks.