Name the oral pill used an a contraceptive by human females. Explain how does it prevent pregnancy?

Explanation

**Step-by-Step Solution:**

1. **Identify the Oral Pill:**
The oral pill commonly used as a contraceptive by human females is known as "Saheli." Other examples include "Maladi," "Unwanted 72," and "iPill."

2. **Understand the Composition:**
These contraceptive pills typically contain hormones, primarily a combination of progesterone and estrogen.

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