During the development of embryo which of the following occur first
Differentiation of tissue
Differentiation of cells
Differentiation of organs
Differentiation of organ system
All of the following statements concerning pregnancy are accurate $EXCEPT$
Which one of the following is temporary endocrine gland
The persistence of corpus luteum during pregnancy is due to a hormone known as
Which one of the following is not the function of placenta?
The extra structure that provides nutrition to the embryo is