Let-Down Reflex Explained: How Breast Milk Starts to Flow and What to Expect
Mother breastfeeding baby
What is the Let-Down Reflex?
The let-down reflex, also called the milk ejection reflex, is a natural process where your body releases stored milk from the alveoli in your breasts through the milk ducts to your baby. It’s triggered by the hormone oxytocin, released in response to nipple stimulation or even baby cues like crying or touch.
How Does It Work?
When your baby suckles or you pump, nerves in your nipples signal your brain to release oxytocin. This hormone causes the muscles around the milk-producing alveoli to contract, pushing milk toward the nipple—like squeezing a sponge. This is the “let-down.”
What Does Let-Down Feel Like?
Experiences vary:
Tingling or pins-and-needles sensation
Warm rush or mild pressure in the breast
Sudden leaking from the other breast
Emotional shift or strong urge to nurse
Some may feel it distinctly; others barely notice it. And yes—it can be triggered by hearing your baby cry or just thinking about them!
When Let-Down is Slow or Strong
Slow Let-Down: Can result from stress, fatigue, or anxiety. Deep breathing, skin-to-skin, and warm compresses can help.
Overactive Let-Down: Milk flows too quickly. It might cause baby to gulp, cough, or pull off. Try reclining or nursing in side-lying position to slow flow.
Tips to Support Healthy Let-Down
Stay hydrated and nourished
Practice regular skin-to-skin
Use relaxation techniques like music or scent
Try breast compressions while nursing
Avoid stress where possible—oxytocin is shy!
Final Thoughts
The let-down reflex is a beautifully orchestrated system, but it can vary widely. If you’re concerned about your milk flow, reach out to a lactation consultant or health provider for support.
