Peak secretion of estrogen occurs :

Options

A. Just before ovulation
B. Mid luteal phase
C. At the time of ovulation
D. Secretion at the same rate during all phases of menstrual cycle

Answer

To determine when peak secretion of estrogen occurs during the menstrual cycle, we will analyze the hormonal changes throughout the cycle. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Menstrual Cycle
The menstrual cycle is typically divided into several phases: the follicular phase, ovulation, and the luteal phase. Each phase is characterized by varying levels of hormones, including estrogen and progesterone.

**Hint:** Remember the three main phases of the menstrual cycle: follicular phase, ovulation, and luteal phase.

### Step 2: Identify Key Hormones
The primary hormones involved are:
- **Estrogen:** Primarily produced by the developing follicles in the ovaries.
- **Progesterone:** Produced mainly during the luteal phase after ovulation.
- **Luteinizing Hormone (LH):** Triggers ovulation and stimulates estrogen production.
- **Follicle-Stimulating Hormone (FSH):** Stimulates the growth of ovarian follicles.

**Hint:** Focus on the roles of estrogen, progesterone, LH, and FSH during the menstrual cycle.

### Step 3: Analyze Hormone Levels
During the menstrual cycle:
- Estrogen levels rise during the follicular phase, peaking just before ovulation.
- LH surges right before ovulation, which also corresponds with a peak in estrogen levels.
- After ovulation, during the luteal phase, progesterone levels rise, and estrogen levels also increase but not as sharply as during the follicular phase.

**Hint:** Pay attention to the timing of hormone peaks, especially estrogen and LH.

### Step 4: Determine Peak Estrogen Secretion
From the analysis, we find that:
- Estrogen peaks just before ovulation, which is around the 14th day of the menstrual cycle.
- During the mid-luteal phase, while estrogen levels are still present, they are not at their highest.

**Hint:** Remember that the peak of estrogen secretion occurs just before ovulation, not during the luteal phase.

### Step 5: Evaluate the Options
Given the options:
1. Mid luteal phase
2. Just before ovulation
3. At the time of ovulation
4. Secretion at the same rate during all phases

The correct answer is **just before ovulation**, as this is when estrogen levels are at their peak.

**Hint:** Eliminate options that do not align with the timing of hormone peaks.

### Final Answer
The peak secretion of estrogen occurs **just before ovulation**.