A breast pump is a device used to extract milk from the breasts of a woman for the purpose of feeding her baby or storing the milk. It works by using mechanical compression to stimulate the production of milk in the mammary glands and then collects it through tubes connected to the pump. The process can be manual, where the user squeezes a handheld device, or electric, which uses motorized suction to extract the milk. Breast pumps are commonly used by women who need to express their breastmilk for various reasons such as returning to work after giving birth, experiencing engorgement, or having multiple babies that require feeding.