From Placenta to Production: Understanding Lactation

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Milk supply can feel mysterious when you’re tired, sore, and staring at a hungry newborn. We sit down and make lactogenesis practical by walking through what’s happening in the breast during pregnancy, what flips hormonally right after the placenta delivers, and why “milk coming in” usually peaks around days 2 to 5. Along the way, we translate the science into the questions we hear every week: Is leaking in pregnancy a good sign? Why does engorgement happen? When should we worry about a lump, redness, or nipple discharge?

We also get honest about the lived experience of feeding in the real world. We talk delayed lactogenesis and the common culprits like retained placental fragments, postpartum hemorrhage and pituitary effects, PCOS, cesarean timing, and edema from heavy IV fluids that can make latch feel impossible. Then we shift into lactogenesis 3, where supply becomes locally regulated and milk removal drives production, including the role of the feedback inhibitor of lactation. If you’ve ever panicked because your breasts suddenly felt soft or you stopped leaking around week 3, we explain why that can actually be a sign your body has calibrated beautifully.

Letdown is its own puzzle, so we dig into oxytocin, what blocks it (stress, fear, pain, cold), and simple tools that help, including warmth before feeds, cold after, and the “three Ws” that support pumping and letdown: warmth, water, and watching. We wrap with fast myth-busting and one of our favorite postpartum interventions: teaching partners and families how to protect the “oxytocin bubble” so the feeding parent can focus on rest, baby, and recovery. Subscribe for more evidence-based midwifery conversations, share this with a friend who’s feeding a newborn, and leave a review with your biggest milk-supply question.

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