The let-down reflex is what makes breastmilk flow. When your baby sucks at the breast, tiny nerves are stimulated. This causes two hormones – prolactin and oxytocin – to be released into your bloodstream. Prolactin helps make the milk, while oxytocin causes the breast to push out the milk.

Is it normal to have random let down?

Let-down is a normal reflex when your baby sucks on your breasts, but it can also take place before your baby latches on. You may notice your milk let down when you hear your baby cry or if you're overdue for a feeding. Additionally, touching your breasts or using a breast pump can prompt let-down.

Can let down happen when not nursing?

Some moms with sensitive reflexes can let down their milk either right before or right at the beginning of a breastfeeding session. Many women experience an uncontrolled let-down reflex when they hear a baby cry or think of their child—suddenly, milk will begin to flow even if their baby is not nursing.