A contraceptive pill prevents ovulation by

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Contraceptive Pills**: Contraceptive pills are hormonal medications used to prevent pregnancy. They can be classified into two main types: progestin-only pills and combination pills (which contain both estrogen and progestin).

2. **Mechanism of Action**: The primary function of contraceptive pills is to prevent ovulation, which is the release of an egg from the ovaries.

3. **Hormonal Regulation**: The menstrual cycle is regulated by hormones, particularly Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). FSH stimulates the growth of ovarian follicles, while LH triggers ovulation.

4. **Effect of Contraceptive Pills**: When contraceptive pills are taken, they alter the hormonal balance in the body. They decrease the levels of FSH and LH, inhibiting their secretion from the pituitary gland.

5. **Prevention of Ovulation**: By inhibiting the secretion of FSH and LH, contraceptive pills prevent the maturation of ovarian follicles and the subsequent release of an egg, thereby preventing ovulation.

6. **Conclusion**: Therefore, the correct answer to the question "A contraceptive pill prevents ovulation by" is that it inhibits the release of FSH and LH.

**Final Answer**: A contraceptive pill prevents ovulation by inhibiting the release of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH).

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