Question

Which of the following hormone is not secreted by human placenta:

• A. Estrogen
• B. hCG
• C. LH
• D. Progesterone

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks which of the listed hormones is not made by the placenta during pregnancy.

Step 2: Key Concept or Approach:
The placenta secretes several hormones to support pregnancy, but some hormones the body needs during pregnancy still come from other glands, such as the pituitary. Sorting the options by their true source settles the answer.

Step 3: Detailed Explanation:
Estrogen and progesterone are both made by the placenta in large amounts, especially after the first trimester, to maintain the pregnancy.
hCG is made by placental trophoblast cells from the earliest weeks of pregnancy and is even the hormone detected by pregnancy tests.
LH, however, is produced by gonadotroph cells in the anterior pituitary gland, and pregnancy actually suppresses its release since hCG substitutes for its function on the corpus luteum.

Step 4: Final Answer:
LH is the hormone not secreted by the human placenta.