Oral contraceptive pills function by

Options

A. Inhibiting ovulation
B. Stimulating ovulation
C. Stimulating the motility and secretory activity of oviduct
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding Oral Contraceptive Pills**:
Oral contraceptive pills are medications taken by women to prevent pregnancy. They usually contain hormones that influence the reproductive system.

2. **Composition of Oral Contraceptive Pills**:
These pills typically contain a combination of female sex hormones, mainly estrogen and progesterone.

3. **Mechanism of Action**:
The primary function of these hormones in oral contraceptive pills is to inhibit ovulation. This means that they prevent the ovaries from releasing an egg (ovum) during the menstrual cycle.

4. **Impact on Ovulation**:
By inhibiting ovulation, oral contraceptive pills prevent the possibility of fertilization since there is no egg available for sperm to fertilize.

5. **Conclusion**:
Therefore, the correct answer to the question "Oral contraceptive pills function by" is that they function by inhibiting ovulation.

### Final Answer:
**Oral contraceptive pills function by inhibiting ovulation.**

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