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The Prolactin Hormone: Putting the “lact”-tation in Pregnancy




The Prolactin Hormone: Putting the “lact”-tation in Pregnancy


We’ve talked about various hormones associated with pregnancy, including progesterone, relaxin, and estrogen.


Today, let’s focus on the hormone associated with lactation: prolactin.


Prolactin is a hormone produced by the pituitary gland, which is located at the base of your brain. Dopamine and estrogen both play a role in when prolactin is produced and released.


In general, prolactin levels are low unless you are pregnant or breastfeeding. When you become pregnant, prolactin increases to aid in the development of breast tissue (called mammary alveoli), mammary glands found in the breast tissue, and milk production.


If breastfeeding, prolactin levels spike whenever the baby nurses. This maintains milk production and creates the various components of milk (lactose, casein, and lipids). Once you stop breastfeeding, prolactin levels return to normal in 1-2 weeks.


Besides the discomfort that comes as your breasts change during pregnancy and while you are nursing, prolactin doesn’t cause other discomforts or side effects.


The Tennessee Family Doulas team would love to help you learn more about the changes your body will undergo during pregnancy. Sign up for a Childbirth Education class or talk with us about our Doulas support services.

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