Certified Breastfeeding Counselor (CBC) Practice

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Enhance your knowledge and skills as a Certified Breastfeeding Counselor with our comprehensive quiz. Prepare with targeted questions and insights that will boost your confidence and exam readiness!

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What is the main inhibitor of prolactin?

Estrogen
Oxytocin
Progesterone
Testosterone

The correct answer is: Progesterone

Progesterone is the main inhibitor of prolactin. Prolactin is a hormone responsible for lactation and is primarily produced by the pituitary gland. Other hormones, such as estrogen, oxytocin and testosterone, can also play a role in lactation and milk production, but they do not inhibit prolactin like progesterone does. For example, estrogen and oxytocin can stimulate the production of prolactin, while testosterone does not have a significant effect on prolactin levels. Therefore, while the other options may be involved in lactation, they are not the main inhibitor of prolactin.