In which phase of menstrual cycle, progesterone level rises

Options

A. Menstrual phase
B. Proliferative phase
C. Secretory phase
D. Maturation phase.

Answer

**Step-by-Step Solution:**

1. **Understanding the Menstrual Cycle**: The menstrual cycle consists of several phases: menstrual phase, proliferative phase, secretory phase, and maturation phase. Each phase is characterized by different hormonal changes and physiological events.

2. **Identifying the Role of Progesterone**: Progesterone is a hormone produced by the ovaries, particularly after ovulation. Its primary role is to prepare the uterine lining for potential implantation of a fertilized egg, thus supporting pregnancy.

3. **Analyzing Each Phase**:
- **Menstrual Phase**: This phase involves the shedding of the uterine lining and occurs if fertilization does not take place. Progesterone levels are low during this phase.
- **Proliferative Phase**: In this phase, the uterine lining begins to thicken and rebuild after menstruation. Estrogen levels rise, but progesterone levels remain low until ovulation occurs.
- **Secretory Phase**: This phase follows ovulation. After the egg is released, the corpus luteum forms and secretes progesterone. This hormone level rises significantly during this phase to prepare the uterus for a possible pregnancy.
- **Maturation Phase**: This phase refers to the maturation of the egg or ovum, which is not directly related to progesterone levels.

4. **Conclusion**: The phase of the menstrual cycle in which progesterone levels rise is the secretory phase. This is when the body prepares for a potential pregnancy by thickening the uterine lining.

5. **Final Answer**: Therefore, the correct answer is option C, the secretory phase.

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