Which of these interactions between hormones of menstrual cycle is correct ?

Options

A. Estrogen has an inhibitory effect on the release of LH but a stimulatory effect on the release of FSH
B. Estrogen has an inhibitory effect on the release of FSH but a stimulatory effect on the release of LH
C. Progesterone has an inhibitory effect on the release of LH but a stimulatory effect on the release of FSH
D. Progesterone has an inhibitory effect on the release of FSH but a stimulatory effect on the release of LH

Answer

To solve the question regarding the interactions between hormones of the menstrual cycle, we will analyze each statement provided and determine their correctness based on our understanding of the hormonal interactions involved.

### Step-by-Step Solution:

1. **Understanding Hormones in the Menstrual Cycle**:
- The key hormones involved in the menstrual cycle are Estrogen, Progesterone, Luteinizing Hormone (LH), and Follicle Stimulating Hormone (FSH).
- Estrogen and Progesterone are produced by the ovaries, while LH and FSH are produced by the pituitary gland.

2. **Analyzing Statement 1**:
- **Statement**: Estrogen has an inhibitory effect on the release of LH but a stimulatory effect on the release of FSH.
- **Analysis**: This statement is incorrect. Estrogen actually has a stimulatory effect on LH and an inhibitory effect on FSH.

3. **Analyzing Statement 2**:
- **Statement**: Estrogen has an inhibitory effect on the release of FSH but a stimulatory effect on the release of LH.
- **Analysis**: This statement is correct. Estrogen inhibits FSH secretion and stimulates LH secretion, especially leading up to ovulation.

4. **Analyzing Statement 3**:
- **Statement**: Progesterone has an inhibitory effect on the release of LH and FSH.
- **Analysis**: This statement is incorrect. Progesterone does not have a direct effect on the release of LH and FSH; its primary role is to maintain the uterine lining.

5. **Analyzing Statement 4**:
- **Statement**: Progesterone has a stimulatory effect on the release of LH and FSH.
- **Analysis**: This statement is also incorrect. As mentioned, progesterone does not stimulate LH or FSH release.

6. **Conclusion**:
- Based on the analysis, the only correct statement regarding the interactions between hormones of the menstrual cycle is Statement 2.

### Final Answer:
The correct interaction between hormones of the menstrual cycle is: **Estrogen has an inhibitory effect on the release of FSH but a stimulatory effect on the release of LH.** (Option B)