What is the work of progesterone which is present in oral contraceptive pills ?

Options

A. To inhibit ovulation
B. To check oogenesis
C. To check entry into cervix and to make them inactive
D. To check sexual behavior

Answer

### Step-by-Step Solution:

1. **Understanding Oral Contraceptive Pills**: Oral contraceptive pills, commonly known as birth control pills, are medications taken by women to prevent pregnancy. They typically contain hormones such as estrogen and progesterone.

2. **Role of Progesterone**: Among the hormones present in these pills, progesterone plays a crucial role. It is important to understand how progesterone functions in the context of the menstrual cycle and ovulation.

3. **Inhibition of FSH and LH**: Progesterone works by reducing the activity of two key hormones: Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). Both of these hormones are essential for the process of ovulation, which is the release of an egg from the ovaries.

4. **Preventing Ovulation**: By inhibiting the secretion and action of FSH and LH, progesterone effectively prevents ovulation. This means that no egg is released from the ovaries, thereby reducing the chances of fertilization and pregnancy.

5. **Conclusion**: Therefore, the primary work of progesterone in oral contraceptive pills is to inhibit ovulation, preventing the release of an egg from the ovaries.

### Final Answer:
The work of progesterone present in oral contraceptive pills is to inhibit ovulation.

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