Certified Breastfeeding Counselor (CBC) Practice

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Certified Breastfeeding Counselor Exam with our comprehensive quiz featuring flashcards and multiple-choice questions, designed to enhance your understanding and readiness.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

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.