When a human female reaches a certain age,then vaginal bleeding occurs for a few days after regular intervals of time :
At what particular event in the life of human female this process stops temporarily but starts again ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Menstruation**: The process of vaginal bleeding that occurs in human females at regular intervals is known as menstruation or periods. This is a natural biological process that signifies the shedding of the uterine lining when there is no fertilization of the ovum.

2. **Onset of Menstruation**: Menstruation typically begins during puberty, which is the stage of development when a person becomes sexually mature. For females, this usually occurs between the ages of 10 and 15.

3. **Temporary Cessation of Menstruation**: There is a particular event in a female's life when menstruation stops temporarily. This event is pregnancy. When a female becomes pregnant, the body undergoes hormonal changes that prevent the menstrual cycle from occurring.

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