Fast-d iaphragm pumps use a diaphragm that is acted on by a lever, and can operate at thousands of cycles per minute. Archived from the original on 14 January They may be manual devices powered by hand or foot movements or electrical devices powered by batteries or electricity from the grid.
Some manufacturers offer adapters to fit a variety of types and sizes of bottles, enabling more flexibility to mix and match products of different brands. Open-collection systems can cause milk to overflow into the collection system tubing, and milk particles being drawn into the pump motor. Some breast pumps are designed to be part of a "feeding system" so that the milk storage portion of the pump is the baby bottle used to feed the infant.
Mechanically, a breast pump triggers the milk ejection response or "letdown". Freezable breastmilk storage bags are available that connect directly to some breast pumps and can then be used with disposable bottle feeding systems.
Pumping may also be desirable to continue lactation and its associated hormones to aid in recovery from pregnancy even if the pumped milk is not used. This page was last edited on 31 December , at Most breast pumps direct the pumped milk into a container that can be used for storage and feeding.