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Question

Which of the following hormone regulates anestrus?

A
Calcitonin
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B
Melatonin
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C
Estrogen
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D
Progesterone
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Solution

The correct option is B Melatonin
The reproductive cycle of the non primate females is called estrous cycle. The phase when the female is sexually receptive is called as estrus and the phase when the female is not sexually receptive is called as anestrus. When the pineal gland is exposed to light, there is release of the hormone melatonin. The hormone causes stimulation and repression of reproduction in different kind of breeders. This hormone regulated the activity and the release of GnRH (gonadotropin releasing hormone).
Thus, the correct answer is option B.

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