Which one of the following is the incorrect match of the events occurring during menstrual cycle ?

Options

A. Menstruation : Breakdown of endomentrium and ovum not fertilised
B. Ovulation : LH and FSH attain peak level
C. Proliferative phase : Rapid regeneration of endometrium and maluration of Graafian follicle
D. Development of corpus luteum : Follicular phase and I ncreased secretion of progesterone

Answer

To determine the incorrect match of events occurring during the menstrual cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Menstrual Cycle Phases**:
- The menstrual cycle is typically a 28-day cycle that consists of four main phases:
- **Follicular Phase**: Development of ovarian follicles.
- **Ovulatory Phase**: Release of the ovum (egg) from the ovary.
- **Luteal Phase**: Formation of the corpus luteum from the ruptured follicle.
- **Menstrual Phase**: Shedding of the endometrial lining if fertilization does not occur.

2. **Analyze Each Option**:
- **Option 1**: "Menstruation is simply the periods or the shedding of the endometrial lining of the uterus."
- This statement is correct as menstruation involves the breakdown and shedding of the endometrial lining.

- **Option 2**: "Ovulation, during this time the LH and FSH attains the peak level."
- This statement is also correct. Ovulation occurs when there is a surge in Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH).

- **Option 3**: "The proliferative phase which is also known as the follicular phase."
- This statement is correct. The proliferative phase corresponds to the follicular phase where the endometrium regenerates.

- **Option 4**: "Development of the corpus luteum occurs during the follicular phase."
- This statement is incorrect. The corpus luteum develops during the luteal phase, not the follicular phase.

3. **Identify the Incorrect Match**:
- After analyzing all the options, Option 4 is the incorrect match because the development of the corpus luteum occurs during the luteal phase, not the follicular phase.

### Conclusion:
The incorrect match of the events occurring during the menstrual cycle is **Option 4**: "Development of the corpus luteum occurs during the follicular phase."

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