Certified Breastfeeding Counselor (CBC) Practice Exam 2026 – The Comprehensive All-in-One Guide to Exam Success!

Progesterone and Prolactin are the main hormones that play a role in the changes that occur in the breast during breastfeeding.

Insulin and Glucagon are hormones that regulate blood sugar levels and have no direct role in milk production.

Testosterone and Estrogen can affect milk production, but they are not essential for breast changes during breastfeeding.

Thyroxine and Cortisol are involved in metabolism and stress response, respectively, but do not have a direct influence on breast changes during breastfeeding.