Which hormone level reaches its peak during the luteal phase of menstrual cycle ?

Options

A. Estrogen
B. Progesterone
C. Luteininzing hormone
D. Follicle stimulating hormone

Answer

To determine which hormone level reaches its peak during the luteal phase of the menstrual cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Menstrual Cycle Phases**: The menstrual cycle is divided into several phases, including the follicular phase, ovulation, and the luteal phase. The luteal phase occurs after ovulation and typically lasts from days 15 to 28 of the cycle.

2. **Identify the Role of Hormones**: During the menstrual cycle, several hormones play crucial roles:
- **Luteinizing Hormone (LH)**: Responsible for triggering ovulation and the formation of the corpus luteum.
- **Follicle Stimulating Hormone (FSH)**: Stimulates the growth of ovarian follicles.
- **Estrogen**: Involved in the thickening of the uterine lining.
- **Progesterone**: Secreted by the corpus luteum, it prepares the endometrium for potential implantation of an embryo.

3. **Focus on the Luteal Phase**: After ovulation, the corpus luteum forms from the remnants of the follicle. This structure is crucial for hormone production during the luteal phase.

4. **Hormonal Changes During the Luteal Phase**:
- The corpus luteum secretes **progesterone**, which reaches its peak levels during this phase.
- While estrogen levels also rise, they do not peak as significantly as progesterone during the luteal phase.

5. **Conclusion**: The hormone that reaches its peak during the luteal phase of the menstrual cycle is **progesterone**.

### Final Answer:
The hormone level that reaches its peak during the luteal phase of the menstrual cycle is **progesterone**.

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