A breast pump system (1) comprises a breast pump arranged to extract milk from a user; and a breathing guidance means configured to provide a suggested breathing pattern to the user. The breathing guidance means may be produced by a motorized breast pump unit (10), or may be a series of stimuli at a stimuli frequency, which are perceivable by the user. The system (1) may include a heart rate monitor for measuring the heart rate of the user, and the suggested breathing pattern may be coupled to the measured heart rate.