Choose the correct answer from the alternatives given.
Which of the following hormone initiates secretion of milk?

Prolactin

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Luteinizing hormone

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Somatotrophic hormone

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Progesterone

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Solution

The correct option is A Prolactin
(A) Prolactin regulates the growth of the mammary glands and formation of milk in them.
(B) Leutinizing hormone stimulates gonadal activity and hence are called gonadotropin.
(C) Somatotrophic hormone or Growth hormone is a peptide hormone that stimulates growth, cell reproduction etc.
(D) Progesterone supports a pregnancy. It also acts on the mammary glands.
So the correct answer is prolactin.

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