During menstrual cycle, the cyclic changes take place in

Options

A. Myometrium
B. Corpus luteum
C. Endometrium secretes nutrients for implanation -11 to 18 days
D. Pertimetrium.

Answer

**Step-by-Step Solution:**

1. **Understanding the Menstrual Cycle**: The menstrual cycle is a monthly process that prepares the female body for potential pregnancy. It involves various phases: menstrual phase, follicular phase, ovulation, and luteal phase.

2. **Identifying the Layers of the Uterus**: The uterus has three main layers:
- **Perimetrium**: The outermost layer.
- **Myometrium**: The middle muscular layer.
- **Endometrium**: The innermost layer which thickens during the cycle.

3. **Recognizing the Changes During the Cycle**: During the menstrual phase, the endometrium undergoes significant changes. If fertilization does not occur, the endometrium sheds, leading to menstrual bleeding.

4. **Focusing on the Endometrium**: The endometrium is crucial as it prepares for possible implantation of a fertilized egg. It secretes nutrients to support this process, particularly during the luteal phase (approximately days 11 to 18 of the cycle).

5. **Evaluating the Options**:
- **A. Myometrium**: This layer does not undergo cyclic changes related to menstruation.
- **B. Corpus Luteum**: While it plays a role in hormone production, it is not directly involved in the cyclic changes of the menstrual phase.
- **C. Endometrium secretes nutrients for implantation 11 to 18 days**: This option correctly describes the function of the endometrium during the luteal phase.
- **D. Perimetrium**: This layer remains relatively unchanged during the menstrual cycle.

6. **Conclusion**: The correct answer to the question is option C, as it highlights the role of the endometrium in secreting nutrients for implantation during the luteal phase of the menstrual cycle.

**Final Answer**: C. Endometrium secretes nutrients for implantation 11 to 18 days.

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