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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Prolactin:
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The correct answer is  Prolactin, though structurally related to growth hormone does not share its somatotropic activity. Dopamine binds to the lactotropes and inhibits the synthesis and release of prolactin. Hyperprolactinemia suppresses the hypothalamic-pituitary-gonadal axis, causes infertility in women and suppresses the normal menstrual cycle in lactating women.