Breast pump

A breast milk pump comprises a breast shield or liner 101 to receive the breast, an air pump 103 generating a base level vacuum and a pumping vacuum, and respective suction channels for drawing the base level and pumping vacuums on respective sides of the liner. The intermittent or alternating pumping vacuum amplitude preferably exceeds the base level of suction, and may be delivered via a diaphragm or membrane of the breast shield. The base level suction may draw milk within a nipple receiving tunnel 109 and may be applied via another diaphragm or membrane 111 within the breast pump unit and/or within a milk container 104 connected thereto, the pump and milk receptacle preferably forming an in-bra wearable device (Fig. 14). Pumping may involve sequentially evacuating the respective suction channels, e.g. using a three-way solenoid valve 105.