Prolactin-releasing hormone

if growth hormone and prolactin bind to the same receptor, why don't we produce milk upon growth?

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Growth Hormone? You mean GH? Well, I don't think so. As far as I know, breast cells are not the target of that hormone. GH especially works in bone cells. Prolactin works on breast cells too (alveolus). But naturally this hormone is prepared for lactation. ...

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