What is menstrual cycle ? Name any two stages of menstrual cycle.

Explanation

### Step-by-Step Solution:

1. **Definition of Menstrual Cycle**:
The menstrual cycle is a monthly process that involves a series of physiological changes in a woman's body, primarily aimed at preparing for potential pregnancy. It typically lasts between 28 to 30 days and is characterized by vaginal bleeding, known as menstruation.

2. **Duration of Menstruation**:
The menstrual phase, or menstruation, usually lasts for about 5 to 6 days. This is when the body sheds the lining of the uterus if no fertilization has occurred.

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