Give the term for the periodic vaginal bleeding.

Explanation

**Step-by-Step Solution:**

1. **Understanding Vaginal Bleeding**: The question asks for the term that describes periodic vaginal bleeding in humans. This bleeding is associated with the female reproductive cycle.

2. **Identifying the Cycle**: In females, this periodic bleeding is part of the menstrual cycle, which typically occurs every 28 to 30 days.

3. **Role of the Ovary**: During the menstrual cycle, an egg (ovum) is produced in the ovaries. If this egg is not fertilized, it degenerates.

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