Which of the following is the correct sequence of hormonal increase beginning with menstruation?

Options

A. estrogen, progesterone, FSH
B. FSH, progesterone, estrogen
C. FSH, estrogen, progesterone
D. estrogen, FSH, progesterone

Answer

To determine the correct sequence of hormonal increase beginning with menstruation, we need to understand the hormonal changes that occur during the menstrual cycle. Here’s a step-by-step breakdown:

### Step 1: Understanding Menstrual Cycle Phases
The menstrual cycle consists of several phases:
1. **Menstrual Phase**: This is when menstruation occurs, and hormone levels are low.
2. **Follicular Phase**: Following menstruation, FSH (Follicle Stimulating Hormone) is released to stimulate the maturation of follicles in the ovaries.
3. **Ovulation**: Triggered by a surge in LH (Luteinizing Hormone), leading to the release of a secondary oocyte.
4. **Luteal Phase**: After ovulation, the corpus luteum forms and secretes progesterone.

### Step 2: Identifying Hormonal Changes
- **FSH**: Increases first during the follicular phase to stimulate follicle maturation.
- **Estrogen**: Released from the developing follicles as they mature, leading to an increase in estrogen levels.
- **LH**: Surges just before ovulation, but is not the focus of this question.
- **Progesterone**: Secreted by the corpus luteum after ovulation, leading to an increase in progesterone levels.

### Step 3: Analyzing the Options
Now, let's analyze the provided options based on the hormonal sequence:
1. **Option 1**: Estrogen, Progesterone, FSH - Incorrect, as FSH is released first.
2. **Option 2**: FSH, Progesterone, Estrogen - Incorrect, as estrogen is released after FSH.
3. **Option 3**: FSH, Estrogen, Progesterone - Correct, as FSH is released first, followed by estrogen, and then progesterone.
4. **Option 4**: Estrogen, FSH, Progesterone - Incorrect, as FSH is released before estrogen.

### Conclusion
The correct sequence of hormonal increase beginning with menstruation is **FSH, Estrogen, Progesterone**. Therefore, the answer is **Option 3**.

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