Question

Choose the correct option.

About which day in a normal human menstrual cycle does the rapid secretion of LH (popularly called LH surge) normally occur?

• A. 20th day
• B. 14th day
• C. 11th day
• D. 5th day

Answer 1

The correct option is B

14th day

The correct option is C

Explanation of correct option:

1. The reproductive cycle in the female primates is known as the menstrual cycle, which is repeated at an average interval of 28 or 29 days.
2. LH (Luteinizing Hormone)is a hormone produced by the anterior pituitary gland.
3. LH surge means a sudden release of LH; it usually occurs on the 14th day of the cycle when estrogen is sufficiently high.
4. This surge leads to a set of events in the Graafian follicle of ova resulting in rupture of the Graafian follicle and thereby the release of an ovum(ovulation).

Explanation of incorrect answers:

Option A:

On the 20th day, if the fertilization does not occur, the corpus luteum fades away.

Option C:

On the 11th day, the lining of the womb thickens for the preparation of the egg.

Option D:

On the 5th day, the lining of the womb breakdown, and that leads to menstruation.

Final Answer: Normally, an LH surge occurs on the 14th day of a normal human menstrual cycle.