When a human female reaches a certain age,then vaginal bleeding occurs for a few days after regular intervals of time :
What name is given to the event when this process stops permanently ?

Explanation

To answer the question, we need to identify the event that marks the permanent cessation of the menstrual cycle in human females. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Menstrual Cycle**: The menstrual cycle begins when a female reaches puberty, typically between the ages of 11 to 16 years. This cycle involves regular vaginal bleeding, which occurs approximately every 28 days.

2. **Duration of Menstrual Cycle**: The menstrual cycle continues for many years, usually lasting until a woman is around 45 to 50 years old. During this time, the body goes through various hormonal changes that regulate the cycle.

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