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How Breast Milk Is Made by the Body
Ever wonder exactly how your body creates milk? It’s a hormonal masterpiece. During pregnancy, estrogen and progesterone grow the milk ducts, while prolactin builds the alveoli—the tiny sacs where milk is made. Before birth, these cells produce colostrum—your baby's first, nutrient-packed food. When the baby is born and the placenta leaves, progesterone drops sharply. This signals your body to ramp up full milk production. Now, when the baby suckles, nerve signals travel to the brain, triggering oxytocin. This hormone squeezes the alveoli to release milk. It’s simple supply and demand: the more milk removed, the more your body makes. Empty breasts signal for more production.
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Ever wonder exactly how your body creates milk? It’s a hormonal masterpiece. During pregnancy, estrogen and progesterone grow the milk ducts, while prolactin builds the alveoli—the tiny sacs where milk is made. Before birth, these cells produce colostrum—your baby's first, nutrient-packed food. When the baby is born and the placenta leaves, progesterone drops sharply. This signals your body to ramp up full milk production. Now, when the baby suckles, nerve signals travel to the brain, triggering oxytocin. This hormone squeezes the alveoli to release milk. It’s simple supply and demand: the more milk removed, the more your body makes. Empty breasts signal for more production.
