Question

Contraceptive oral pills help in birth control by

• A. Preventing ovulation
• B. Killing the ova
• C. Forming barriers between sperms and ova
• D. Killing the sperms

Answer 1

Answer: (A)

Oral contraceptive pills are used to control birth of the child. These are also known as birth control pills. These pills contain the combination of synthetic estrogen and progesterone and control the birth by stopping ovulation ( release of ovum from the ovaries). They check ovulation by maintaining the hormone levels more consistent. The high level of estrogen is necessary for the process of ovulation. In the absence of high estrogen level, the ovary does not get the signal to release an egg, which means no fertilization or pregnancy. The progesterone also thickens cervical mucus, so that the sperm cannot reach the egg. It forms the lining of the uterus unreceptive for the implantation. So, the correct option is A.