A contraceptive pill prevents ovulation by

Options

A. Blocking fallopian tube
B. Inhibiting release of FSH & LH
C. Stimulating release of FSH & LH
D. Causing immediate degeneration of released ovum

Answer

To answer the question "A contraceptive pill prevents ovulation by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ovulation**:
- Ovulation is the process where an ovary releases an egg (ovum). This process is regulated by hormones in the body, primarily Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH).

2. **Role of FSH and LH**:
- FSH is responsible for the growth and maturation of ovarian follicles, while LH triggers ovulation. For ovulation to occur, a peak in LH levels is crucial.

3. **Mechanism of Contraceptive Pills**:
- Contraceptive pills are designed to prevent pregnancy. They usually contain hormones such as estrogen and progesterone.

4. **Inhibition of Hormones**:
- The primary way that contraceptive pills prevent ovulation is by inhibiting the release of FSH and LH from the pituitary gland. When these hormones are inhibited, the signals necessary for the ovary to release an egg are blocked.

5. **Conclusion**:
- Therefore, the correct answer to the question is **b. Inhibiting release of FSH and LH**. This inhibition prevents the natural hormonal surge that leads to ovulation.