Question

A contraceptive pill prevents ovulation by

• 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 1

The Correct Option is B

Birth control pills, also known as contraceptive pills, are a widely used form of contraception aimed at preventing pregnancy. These pills consist of synthetic steroid hormones, which can either contain progestin alone or a combination of progestin and estrogen.

The primary mechanism of action of contraceptive pills involves the suppression of hormones released by the pituitary gland, namely luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones are crucial for the normal functioning of the ovaries. When FSH and LH levels are suppressed, ovulation—the release of a mature egg from the ovary—is inhibited. This, in turn, significantly reduces the likelihood of fertilization by a male sperm cell.

Contraceptive pills containing only progestin have an additional mechanism of action. They work by thickening the mucus in the cervix, making it more difficult for sperm to penetrate and reach the egg, even if ovulation were to occur.

Overall, contraceptive pills offer an effective means of birth control by altering hormonal levels and inhibiting ovulation, thereby preventing pregnancy.