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Question

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

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

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D
Blocking ovulation
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Solution

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.


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