Question

What changes are observed in the uterus subsequent to implantation of young embryo?

• A. The uterine wall thickens.
• B. Placenta develops.
• C. Both A and B.
• D. The uterine wall shrinks.

Answer 1

Answer: (C)

Both A and B.

If fertilization occurs, the loss of corpus luteum is prevented. There is formation of new special tissue called as placenta which connects embryo to the uterine wall and provides nutrients and oxygen to the embryo.
The increase in the levels of estrogen hormone causes the formation of a very thick endometrium.
Thus, the correct answer is option (C).