Question

Combined oral contraceptive pills help in birth control by

• A. killing the sperms
• B. forming barriers between the sperm and ova
• C. preventing ovulation
• D. killing the ova

Answer 1

The correct option is C preventing ovulation

Combined oral contraceptive pills refer to the pills that contain a combination of both estrogen and progestogen. They help in birth control by preventing ovulation. Progestogen inhibits the release of GnRH from the hypothalamus which in turn inhibits the release of gonadotropins LH and FSH. In the absence of FSH, the ovarian follicles don’t grow and hence there is no ovulation. They don’t kill the ova.

Formation of barriers between the sperm and ova means preventing the physical contact between the sperm and ova. This can be done using barrier methods. The most common barriers are condoms, diaphragms, cervical caps, and vaults.
Spermicidal agents can be used to kill sperms. They contain chemicals that can kill sperms.