Which among the following is not a phase in menstrual cycle?

Options

A. Menstrual phase
B. Secretory phase
C. Ovulatory phase
D. Copulation phase

Answer

To determine which option is not a phase in the menstrual cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Menstrual Cycle**: The menstrual cycle is a monthly cycle that prepares the female body for potential pregnancy. If fertilization does not occur, the cycle culminates in menstruation.

2. **Identify the Phases of the Menstrual Cycle**:
- **Menstrual Phase**: This is the phase when the uterus sheds its lining, resulting in bleeding. It typically lasts from 3 to 7 days.
- **Follicular Phase**: This phase involves the maturation of follicles in the ovaries, stimulated by hormones such as Follicle Stimulating Hormone (FSH).
- **Ovulatory Phase**: This phase occurs around the 14th day of the cycle when a mature ovum is released from the ovary.
- **Luteal Phase (Secretory Phase)**: After ovulation, the body prepares for a possible pregnancy, and hormones are released to maintain the uterine lining.

3. **Evaluate the Given Options**: The question asks which option is not a phase in the menstrual cycle. The options typically include:
- Menstrual Phase
- Follicular Phase
- Ovulatory Phase
- Copulation Phase

4. **Identify the Incorrect Option**: Among the options, the "Copulation Phase" is not a recognized phase of the menstrual cycle. Copulation refers to the act of mating, not a phase in the menstrual cycle itself.

5. **Conclusion**: The correct answer is that the "Copulation Phase" is not a phase in the menstrual cycle.

### Final Answer:
The phase that is not part of the menstrual cycle is the **Copulation Phase**.

---