While explaining milk production and release to a group of expectant parents, the nurse educates the ...

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During lactation, milk is secreted by alveolar cells, which are under the influence of the anterior pituitary hormone prolactin. Milk ejection from the ductile system occurs in response to the release of oxytocin from the posterior pituitary. The suckling of the infant provides the stimulus for milk ejection. Suckling produces feedback to the hypothalamus, stimulating the release of oxytocin from the posterior pituitary. Oxytocin causes contraction of the myoepithelial cells lining the alveoli and ejection of milk into the ductal system.