Question

In a pregnant woman, ___________ is the major source of progesterone during the first trimester.

• A. corpus callosum
• B. corpus albicans
• C. placenta
• D. corpus luteum

Hint:

{First trimester → corpus luteum} Later pregnancy → placenta

Answer 1

The Correct Option is D

Step 1: Role of progesterone.
Progesterone is essential for maintaining pregnancy by preparing the uterine lining for implantation.
Step 2: Hormone source during early pregnancy.
During the first trimester, progesterone is secreted mainly by the corpus luteum.
Step 3: Change in later stages.
After the first trimester, the placenta takes over progesterone production.