Explain how the act as contraceptive:
Saheli

Explanation

**Step-by-Step Solution:**

1. **Definition of Saheli**: Saheli is an oral contraceptive pill that is taken once a week. It is designed to prevent pregnancy.

2. **Hormonal Composition**: Saheli contains a combination of two hormones: progesterone and estrogen. These hormones play a crucial role in regulating the female reproductive system.

3. **Mechanism of Action**:
- **Inhibition of Ovulation**: Saheli works primarily by inhibiting ovulation. This means that it prevents the ovaries from releasing an egg, which is necessary for fertilization to occur.
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