Give the biological/technical terms for the following:
The permanent stoppage of menstruation at about the age of 45 years in a female.

Explanation

**Step-by-Step Solution:**

1. **Understanding Menstruation**: Menstruation is the process where blood and tissue from the uterus are expelled through the vagina. This occurs as part of the menstrual cycle, which prepares a woman's body for potential pregnancy each month.

2. **Menstrual Cycle Duration**: The menstrual cycle typically lasts about 28 to 29 days. It is regulated by hormones such as estrogen and progesterone, which help in maturing eggs in the ovaries and preparing the uterine lining for a possible pregnancy.

3. **What Happens if Pregnancy Does Not Occur**: If a woman does not become pregnant, the thickened lining of the uterus, which is rich in nutrients and blood, is no longer needed. Consequently, this lining breaks down and is expelled from the body, resulting in menstruation.

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