Question

Progesterone, which is the most important component of the oral contraceptive pills, prevents pregnancy by:

• A. Preventing formation of ova
  
• B. Creating unfavorable chemical environment for the sperms to survive in the female reproductive tract
  
• C. Preventing the cleavage of the fertilized egg
  
  
• D. Blocking ovulation

Answer 1

The correct option is A Preventing formation of ova

The next menstrual cycle starts by the release of the egg in the ovary under the action of hormone FSH. A signal, to the pituitary to produce FSH, comes from the decline of progesterone in the body. If progesterone level is kept high deliberately, an egg will not be formed and released too.