What happens in case an egg fails to fertilize?

Explanation

### Step-by-Step Solution:

1. **Understanding the Female Reproductive System**:
- The female reproductive system consists of various parts including the ovaries, oviducts (fallopian tubes), uterus, and vagina. The ovaries are responsible for producing eggs.

2. **Egg Production**:
- Each month, during the menstrual cycle, the ovaries release one egg. This process is known as ovulation.

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